25 Which of the following summarises the change in wave characteristics on going from infra-red to ultraviolet in the electromagnetic spectrum?

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1 PhysicsndMthsTutor.com 25 Which of the following summrises the chnge in wve chrcteristics on going from infr-red to ultrviolet in the electromgnetic spectrum? 972//M/J/2 frequency speed (in vcuum) decreses decreses decreses remins constnt increses remins constnt increses increses 26 The digrm shows cthode-ry oscilloscope trce of sound wve. The time-bse is clibrted t 2. ms cm. 972//M/J/2 Wht is the frequency of the sound wve? 62.5 Hz 25 Hz 25 Hz 5 Hz 27 Which sttement correctly reltes the intensity of sound wve to the vibrtions of the molecules? intensity α mplitude intensity α (mplitude) 2 intensity α intensity α () 2 972//M/J/2

2 PhysicsndMthsTutor.com 25 Which vlue is possible wvelength for rdition in the microwve region of the electromgnetic spectrum? 972//O/N/2 3 2 m 3 5 m 3 8 m 3 m 26 The four grphs represent progressive wve on stretched string. Grphs nd show how the d vries with distnce x long the string t one instnt. Grphs nd show how the d vries with time t t prticulr vlue of x. 972//O/N/2 The lbels on the grphs re intended to show the wvelength λ, the period T, nd the mplitude of the wve, but only one grph is correctly lbelled. Which grph is correctly lbelled? d T x d x d t d T t 27 wve of mplitude hs n intensity of 3. Wm //O/N/2 Wht is the intensity of wve of the sme frequency tht hs n mplitude 2? 4.2 Wm 2 6. Wm 2 9. Wm 2 2 Wm 2 23 Which of the following is true for ll trnsverse wves? 972//M/J/3 They re ll electromgnetic. They cn ll be polrised. They cn ll trvel through vcuum. They ll involve the oscilltion of toms.

3 PhysicsndMthsTutor.com 25 Electromgnetic wves of wvelength λ nd frequency f trvel t speed c in vcuum. Which of the following describes the wvelength nd speed of electromgnetic wves of frequency f /2? 972//M/J/3 wvelength speed in vcuum λ /2 c /2 λ /2 c 2λ c 2λ 2c 26 sound wve is displyed on the screen of cthode-ry oscilloscope. The time bse of the c.r.o. is set t 2.5ms/cm. 972//M/J/3 cm Wht is the frequency of the sound wve? 5 Hz Hz 2 Hz 4 Hz 27 When the light from two lmps flls on screen, no interference pttern cn be obtined. Why is this? 972//M/J/3 The lmps re not point sources. The lmps emit light of different mplitudes. The light from the lmps is not coherent. The light from the lmps is white.

4 PhysicsndMthsTutor.com 23 The grph shows how the of prticle in wve vries with time. 972//O/N/3 /cm time/s 2 Which of the following is correct? The wve hs n mplitude of 2 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 2 cm nd must be trnsverse. The wve hs n mplitude of 4 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 4 cm nd must be trnsverse. 25 Which of the following pplies to progressive trnsverse wve? 972//O/N/3 trnsfers energy cn be polrised no no no yes yes no yes yes 24 Which observtion indictes tht sound wves re longitudinl? 972//M/J/4 Sound cn be reflected from solid surfce. Sound cnnot be polrised. Sound is diffrcted round corners. Sound is refrcted s it psses from hot ir to cold ir.

5 PhysicsndMthsTutor.com 25 The digrm shows trnsverse wve on rope. The wve is trvelling from left to right. t the instnt shown, the points P nd Q on the rope hve zero nd mximum respectively. Q 972//M/J/4 P direction of wve Which of the following describes the direction of motion, if ny, of the points P nd Q t this instnt? point P point Q downwrds sttionry sttionry downwrds sttionry upwrds upwrds sttionry 26 plne wve of mplitude is incident on surfce of re S plced so tht it is perpendiculr to the direction of trvel of the wve. The energy per unit time reching the surfce is E. The mplitude of the wve is incresed to 2 nd the re of the surfce is reduced to 2 S. How much energy per unit time reches this smller surfce? 972//M/J/4 4E 2E E E 2 27 Wht is the pproximte rnge of frequencies of infr-red rdition? 972//M/J/4 x 3 Hz to x 9 Hz x 9 Hz to x Hz x Hz to x 4 Hz x 4 Hz to x 7 Hz 26 wve of mplitude 2 mm hs intensity I X. nother wve of the sme frequency but of mplitude 5 mm hs intensity I Y. Wht is I I X Y? //O/N/4

6 PhysicsndMthsTutor.com 24 Which of the following is longitudinl wve? 972//O/N/4 light wve trvelling through ir rdio wve from brodcsting sttion ripple on the surfce of wter sound wve trvelling through ir 23 Wht do not trvel t the speed of light in vcuum? 972//M/J/5 electrons microwves rdio wves X-rys 24 The number of wvelengths of visible light in one metre is of the order of 972//M/J/ helth inspector is mesuring the intensity of sound. Ner loudspeker his meter records n intensity I. This corresponds to n mplitude of the sound wve. t nother position the meter gives n intensity reding of 2 I. Wht is the corresponding sound wve mplitude? //M/J/ 26 sound wve is set up in long tube, closed t one end. The length of the tube is djusted until the sound from the tube is loudest. Wht is the nture of the sound wve in the tube? 972//M/J/ longitudinl nd progressive longitudinl nd sttionry trnsverse nd progressive trnsverse nd sttionry 25 The frequency of certin wve is 5 Hz nd its speed is 34 m s. 972//M/J/6 Wht is the phse difference between the motions of two points on the wve.7 m prt? π rd π rd 3 π rd π rd 4 2 4

7 PhysicsndMthsTutor.com 22 Polristion is phenomenon ssocited with certin type of wve. 972//O/N/ Which condition must be fulfilled if wve is to be polrised? It must be light wve. It must be longitudinl wve. It must be rdio wve. It must be trnsverse wve. 23 sound wve hs y t distnce x from its source t time t. 972//O/N/ Which grph correctly shows the mplitude nd the wvelength λ of the wve? y λ y λ distnce x distnce x y λ y λ time t time t 23 Which phenomenon is ssocited with trnsverse wves but not longitudinl wves? polristion 972//M/J/6 reflection refrction superposition 23 The order of mgnitude of the frequency of the longest-wvelength ultrviolet wves cn be expressed s x Hz. 972//O/N/9 Wht is the vlue of x?

8 PhysicsndMthsTutor.com 24 The intensity of progressive wve is proportionl to the squre of the mplitude of the wve. It is lso proportionl to the squre of the frequency. 972//O/N/5 The vrition with time t of x of prticles in medium, when two progressive wves P nd Q pss seprtely through the medium, re shown on the grphs. x wve P x wve Q 2x x x t 2t t t 2t t The intensity of wve P is I. Wht is the intensity of wve Q? ½ I I 8I 6 I 25 sound wve of frequency 5 Hz trvels in wter t speed of 5 m s. It then trvels through the surfce of the wter nd into ir, where its speed is 3 m s. 972//O/N/5 Which line in the tble gives the correct vlues for the wvelengths of the sound in wter nd in ir? wvelength in wter / m wvelength in ir / m wve motion is described by the oscilltion of prticles. 972//O/N/6 Wht is the nme given to the number of complete oscilltions of prticle in one second? mplitude frequency wvelength wve speed

9 PhysicsndMthsTutor.com 24 -time grph is shown for prticulr wve. 972//M/J/6 time second wve of similr type hs twice the intensity nd hlf the frequency. When drwn on the sme xes, wht would the second wve look like? time time time time 25 -time grph for trnsverse wve is shown in the digrm. 972//O/N/6 X time Y The phse difference between X nd Y cn be expressed s nπ. Wht is the vlue of n?

10 PhysicsndMthsTutor.com 26 ontinuous wter wves re diffrcted through gp in brrier in ripple tnk. 972//O/N/6 Which chnge will cuse the diffrction of the wves to increse? incresing the frequency of the wves incresing the width of the gp reducing the wvelength of the wves reducing the width of the gp 2 Which of the following types of wve cn be polrised? 972//M/J/7 longitudinl progressive wve longitudinl sttionry wve trnsverse sttionry wve trnsverse sound wve 22 Sound wve X hs intensity 2 times greter thn tht of sound wve Y. 972//M/J/7 y how much is the mplitude of X greter thn the mplitude of Y? 6 times times 5 times 2 times 23 The grph shows the shpe t prticulr instnt of prt of trnsverse wve trvelling long string. 972//M/J/7 P Q R S distnce long string Which sttement bout the motion of points in the string is correct? The speed t point P is mximum. The t point Q is lwys zero. The energy t point R is entirely kinetic. The ccelertion t point S is mximum.

11 PhysicsndMthsTutor.com 24 The digrm illustrtes prt of the electromgnetic spectrum. 972//M/J/7 high frequencies visible 2 low frequencies Which lbels re correct for the regions mrked nd 2? 2 infrred X-rys microwves X-rys ultrviolet microwves X-rys infrred 2 Wht is the reltionship between the intensity I nd the mplitude of wve? 972//O/N/7 I I 2 = constnt = constnt I = constnt I 2 = constnt 23 The grph represents sinusoidl wve in the se, trvelling t speed of 8. m s, t one instnt of time. The mximum speed of the oscillting prticles in the wve is 2πf, where is the mplitude nd f is the frequency. / m 2 972//O/N/7 P 5 position / m 2 n object P of mss 2. 3 kg flots on the surfce. Wht is the mximum kinetic energy of P due to the wve? ssume tht its motion is verticl..26 mj 4. mj 39 mj 64 mj

12 PhysicsndMthsTutor.com 22 n electromgnetic wve hs frequency of 8 Hz. 972//O/N/7 In which region of the electromgnetic spectrum does the wve occur? infr-red rdio ultrviolet visible 25 The grph shows how the height of wter surfce t point in hrbour vries with time t s wves pss the point. 972//M/J/8 height men height p t Wht re p nd q? q p q wvelength period mplitude wvelength mplitude period 26 The intensity I of sound t point P is inversely proportionl to the squre of the distnce x of P from the source of the sound. Tht is 972//M/J/8 I 2 x. source of sound S P Q r 2r ir molecules t P, distnce r from S, oscillte with mplitude 8. μm. Point Q is situted distnce 2r from S. Wht is the mplitude of oscilltion of ir molecules t Q?.4 μm 2. μm 2.8 μm 4. μm

13 PhysicsndMthsTutor.com 27 Sound wves, emitted by smll loudspeker, re reflected by wll. 972//M/J/8 The frequency f of the wves is djusted until sttionry wve is formed with the ntinode nerest the wll t distnce x from the wll. Which expression gives f in terms of x nd the speed of sound c? f = 4c x f = 2c x c f = 2 x c f = 4 x 24 The digrm shows two wves X nd Y. 972//O/N/8 wve X wve Y time Wve X hs mplitude 8 cm nd frequency Hz. Wht re the mplitude nd frequency of wve Y? mplitude / cm frequency / Hz Light cn exhibit ll of the properties listed. 972//O/N/8 Which property cn sound not exhibit? interference polristion refrction totl internl reflection 22 The order of mgnitude of the frequency of the longest-wvelength ultrviolet wves cn be expressed s x Hz. Wht is the vlue of x? /2/O/N/9

14 PhysicsndMthsTutor.com 26 The digrm represents the screen of cthode-ry oscilloscope displying two sound wves lbelled X nd Y. 972//O/N/8 X Y Wht is the rtio intensity of sound wve X? intensity of sound wve Y Which wve properties chnge when light psses from ir into glss? 972//M/J/9 colour nd speed frequency nd wvelength speed nd wvelength wvelength nd colour 24 The light from two lsers psses through vcuum. One lser emits red light nd the other emits green light. Which property of the two lser bems must be different? 972//O/N/9 mplitude frequency plne of polristion speed 23 The mplitude of wve is nd its intensity is I. 972/2/O/N/ Which mplitude is necessry for the intensity to be doubled to 2I? 2 2 2

15 PhysicsndMthsTutor.com 23 The light from two lsers psses through vcuum. One lser emits red light nd the other emits green light. Which property of the two lser bems must be different? 972/2/O/N/9 mplitude frequency plne of polristion speed 22 Electromgnetic wves from n unknown source in spce were found to be significntly diffrcted when pssing through gps of the order of 5 m. 972//M/J/ Which type of wve re they most likely to be? rdio wves microwves infr-red wves ultrviolet wves 23 Electromgnetic wves from n unknown source in spce were found to be significntly diffrcted when pssing through gps of the order of 5 m. Which type of wve re they most likely to be? 972/3/M/J/ rdio wves microwves infr-red wves ultrviolet wves 24 Electromgnetic wves from n unknown source in spce were found to be significntly diffrcted when pssing through gps of the order of 5 m. 972/2/M/J/ Which type of wve re they most likely to be? rdio wves microwves infr-red wves ultrviolet wves 24 Which vlue is possible wvelength for rdition in the ultr-violet region of the electromgnetic spectrum? 972/2/O/N/ 3 2 m 3 5 m 3 8 m 3 m

16 PhysicsndMthsTutor.com 23 The grph shows how the of prticle in wve vries with time. 972//O/N/ / cm time / s Which sttement is correct? The wve hs n mplitude of 2 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 2 cm nd must be trnsverse. The wve hs n mplitude of 4 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 4 cm nd must be trnsverse. 24 The digrm shows verticl cross-section through wter wve moving from left to right. t which point is the wter moving upwrds with mximum speed? 972//O/N/ 26 sttionry wve is produced by two loudspekers emitting sound of the sme frequency. 972//O/N/ speker X.5 m Y speker 2 When microphone is moved between X nd Y, distnce of.5 m, six nodes nd seven ntinodes re detected. Wht is the wvelength of the sound?.5 m.43 m.25 m.2 m

17 PhysicsndMthsTutor.com 25 When plne-polrised light of mplitude is pssed through polrising filter s shown, the mplitude of the light emerging is cosθ. 972//O/N/ mplitude = intensity = I θ plne polrised light mplitude = cos θ polrising filter The intensity of the initil bem is I. Wht is the intensity of the emerging light when θ is 6.?.25 I.5 I.75 I.866 I 24 When plne-polrised light of mplitude is pssed through polrising filter s shown, the mplitude of the light emerging is cosθ. 972/3/O/N/ mplitude = intensity = I θ plne polrised light mplitude = cos θ polrising filter The intensity of the initil bem is I. Wht is the intensity of the emerging light when θ is 6.?.25 I.5 I.75 I.866 I 26 Which electromgnetic wve would cuse the most significnt diffrction effect for n tomic lttice of spcing round m? 972/3/O/N/ infr-red microwve ultrviolet X-ry

18 PhysicsndMthsTutor.com 25 The digrm shows verticl cross-section through wter wve moving from left to right. 972/3/O/N/ t which point is the wter moving upwrds with mximum speed? 27 The grph shows how the of prticle in wve vries with time. 972/3/O/N/ / cm time / s Which sttement is correct? The wve hs n mplitude of 2 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 2 cm nd must be trnsverse. The wve hs n mplitude of 4 cm nd could be either trnsverse or longitudinl. The wve hs n mplitude of 4 cm nd must be trnsverse. 23 Which sttement bout sound wves in ir t constnt temperture is correct? 972//M/J/ mplitude is inversely proportionl to velocity. Frequency is inversely proportionl to wvelength. Velocity is proportionl to wvelength. Wvelength is proportionl to mplitude. 25 In which order of mgnitude re the frequencies of electromgnetic wves in the visible spectrum? 972/2/M/J/ 2 Hz 3 Hz 4 Hz 5 Hz

19 PhysicsndMthsTutor.com 22 The four grphs represent progressive wve on stretched string. Grphs nd show how the d vries with distnce x long the string t one instnt. Grphs nd show how the d vries with time t t prticulr vlue of x. 972//M/J/ The lbels on the grphs re intended to show the wvelength λ, the period T nd the mplitude of the wve, but only one grph is correctly lbelled. Which grph is correctly lbelled? d T x d λ x d λ t d T t 24 source of sound of constnt power P is situted in n open spce. The intensity I of sound t distnce r from this source is given by 972//M/J/ I = P 4πr 2. How does the mplitude of the vibrting ir molecules vry with the distnce r from the source? r 2 r r r 2 27 P is source emitting infr-red rdition nd Q is source emitting ultr-violet rdition. The figures in the tble re suggested vlues for the wvelengths emitted by P nd Q. 972//O/N/ Which row is correct? wvelength emitted by P / m wvelength emitted by Q / m

20 PhysicsndMthsTutor.com 26 trnsverse progressive wve is set up on string. 972/2/M/J/ The grph shows the vrition with time of for point on this string. X Y time The seprtion XY on the grph represents the of the wve. X nd Y hve equl 2. Which words correctly complete gps nd 2? 2 time period mplitudes time period s wvelength mplitudes wvelength s 27 If wve cn be polrised, it must be 972/2/M/J/ longitudinl wve. n electromgnetic wve. sound wve. trnsverse wve. 22 source of sound of constnt power P is situted in n open spce. The intensity I of sound t distnce r from this source is given by 972/3/M/J/ I = P 4πr 2. How does the mplitude of the vibrting ir molecules vry with the distnce r from the source? r 2 r r r 2

21 PhysicsndMthsTutor.com 23 The four grphs represent progressive wve on stretched string. Grphs nd show how the d vries with distnce x long the string t one instnt. Grphs nd show how the d vries with time t t prticulr vlue of x. The lbels on the grphs re intended to show the wvelength λ, the period T nd the mplitude of the wve, but only one grph is correctly lbelled. 972/3/M/J/ Which grph is correctly lbelled? d T x d λ x d λ t d T t 28 The digrm shows view from bove of double slit interference demonstrtion. 972//O/N/ L is monochromtic light source with verticl filment. is brrier with two nrrow verticl slits nd S is screen upon which interference fringes form. L S The intensity is I t point on the screen where the centre of the fringe pttern forms. Wht is the intensity, t the sme point, when one of the slits is covered up? I 2 I 2 I 2 2 I 4

22 PhysicsndMthsTutor.com 24 wve tht cn be polrised must be 972/2/O/N/ longitudinl. progressive. sttionry. trnsverse. 25 Which sttement bout electromgnetic rdition is correct? 972/2/O/N/ of wvelength 5 9 m re high-energy gmm rys. of wvelength 3 8 m re ultr-violet wves. of wvelength 5 7 m re infr-red wves. of wvelength 9 7 m re light wves. 26 The digrm shows two sinusoidl wveforms. 972/2/O/N/ wveform P t / s wveform Q t / s t = 8 s t time t = the wves re in phse. t the dotted line, t = 8 s. t which time is the phse difference between the two oscilltions ⅛ of cycle? 4. s 4.5 s 8. s 9. s

23 PhysicsndMthsTutor.com 27 The digrm shows view from bove of double slit interference demonstrtion. 972/3/O/N/ L is monochromtic light source with verticl filment. is brrier with two nrrow verticl slits nd S is screen upon which interference fringes form. L S The intensity is I t point on the screen where the centre of the fringe pttern forms. Wht is the intensity, t the sme point, when one of the slits is covered up? I 2 I 2 I 2 2 I 4 28 P is source emitting infr-red rdition nd Q is source emitting ultr-violet rdition. The figures in the tble re suggested vlues for the wvelengths emitted by P nd Q. 972/3/O/N/ Which row is correct? wvelength emitted by P / m wvelength emitted by Q / m Which observtion indictes tht sound wves re longitudinl? 972//M/J/2 Sound cn be reflected from solid surfce. Sound cnnot be polrised. Sound is diffrcted round corners. Sound is refrcted s it psses from hot ir to cold ir.

24 PhysicsndMthsTutor.com 26 Two wves E nd G re shown. The wves hve the sme speed. 972//M/J/2 y y 2 3 time / ms 2 3 time / ms y y E G Which sttement is correct? Wve E hs greter mplitude thn wve G. Wve E hs greter intensity thn wve G. Wve E hs smller frequency thn wve G. Wve E hs smller wvelength thn wve G. 27 The digrm shows -time grph for progressive wve. 972//M/J/2 / mm time / ms Wht re the mplitude nd frequency of the wve? mplitude / mm frequency / Hz surveyor s device emits lser pulse. 972/2/M/J/2 Wht is the time tken for the pulse to trvel from the device to wll 5 m wy, where it is reflected, nd then return to the device?.5 ns. ns.5 μs. μs

25 PhysicsndMthsTutor.com 27 The period of n electromgnetic wve is. ns. 972/2/M/J/2 Wht re the frequency nd wvelength of the wve? frequency / Hz wvelength / m X nd Y re two points on the surfce of wter in ripple tnk. source of wves of constnt frequency begins to generte wves which then trvel pst X nd Y, cusing them to oscillte. wves Y wter surfce X Wht is the phse difference between X nd Y? /2/M/J/2 26 The digrm shows -time grph for progressive wve. 972/3/M/J/2 / mm time / ms 5 Wht re the mplitude nd frequency of the wve? mplitude / mm frequency / Hz

26 PhysicsndMthsTutor.com 27 Two wves E nd G re shown. The wves hve the sme speed. 972/3/M/J/2 y y 2 3 time / ms 2 3 time / ms y y E G Which sttement is correct? Wve E hs greter mplitude thn wve G. Wve E hs greter intensity thn wve G. Wve E hs smller frequency thn wve G. Wve E hs smller wvelength thn wve G. 29 Which observtion indictes tht sound wves re longitudinl? 972/3/M/J/2 Sound cn be reflected from solid surfce. Sound cnnot be polrised. Sound is diffrcted round corners. Sound is refrcted s it psses from hot ir to cold ir. 3 The digrm shows cthode-ry oscilloscope disply of n electromgnetic wve. 972/2/O/N/2. cm The time bse setting is.2 μs cm. Which sttement is correct? The frequency of the wve is 2.5 electromgnetic spectrum. MHz nd it lies in the rdio wve region of the The frequency of the wve is 2.5 MHz nd it lies in the microwve region of the electromgnetic spectrum. The frequency of the wve is 5. electromgnetic spectrum. MHz nd it lies in the rdio wve region of the The frequency of the wve is 5. MHz nd it lies in the microwve region of the electromgnetic spectrum.

27 PhysicsndMthsTutor.com 26 The digrm shows grph of ginst time for sound wve. 972//O/N/2 time The intensity of the sound is hlved. Which grph shows the of this sound wve? time time time time 27 Wht do not trvel t the speed of light in vcuum? 972//O/N/2 electrons microwves rdio wves X-rys 29 helth inspector is mesuring the intensity of sound. Ner loudspeker, his meter records n intensity I. This corresponds to n mplitude of the sound wve. t nother position, the meter gives n intensity reding of 2I. Wht is the corresponding mplitude of the sound wve? 972/3/O/N/

28 PhysicsndMthsTutor.com 28 iffrction cn be observed when wve psses n obstruction. The diffrction effect is gretest when the wvelength nd the obstruction re similr in size. 972/3/O/N/2 For wves trvelling through ir, wht is the combintion of wve nd obstruction tht could best demonstrte diffrction? microwves pssing steel post rdio wves pssing copper wire sound wves pssing humn hir visible light wves pssing gte post 25 wve hs speed of 34 m s nd period of.28 ms. 972//M/J/3 Wht is its wvelength?.95 m 95 m.2 3 m.2 6 m 26 Which line in the tble summrises the chnge in wve chrcteristics on going from infr-red to ultrviolet in the electromgnetic spectrum? 972//M/J/3 frequency speed in vcuum decreses decreses decreses remins constnt increses remins constnt increses increses 24 light wve of mplitude is incident normlly on surfce of re S. The power per unit re reching the surfce is P. 972//M/J/3 The mplitude of the light wve is incresed to 2. The light is then focussed on to smller re S. 3 Wht is the power per unit re on this smller re? 36P 8P 2P 6P

29 PhysicsndMthsTutor.com 24 The order of mgnitude of the frequency of the shortest wvelength of visible light wves cn be expressed s x Hz. Wht is the vlue of x? /2/M/J/3 25 The digrm shows two wves X nd Y. 972/2/M/J/3 wve X wve Y time Wve X hs mplitude 8 cm nd frequency Hz. Wht re the mplitude nd the frequency of wve Y? mplitude / cm frequency / Hz Wht is correct for ll trnsverse wves? 972/2/M/J/3 They re ll electromgnetic. They cn ll be polrised. They cn ll trvel through vcuum. They ll involve the oscilltion of toms. 22 Which sttement bout different types of electromgnetic wve is correct? 972/3/M/J/3 The frequency of infr-red wves is less thn the frequency of blue light. The frequency of rdio wves is greter thn the frequency of gmm rys. The wvelength of red light is less thn the wvelength of ultrviolet wves. The wvelength of X-rys is greter thn the wvelength of microwves.

30 PhysicsndMthsTutor.com 24 Electromgnetic wves of wvelength λ nd frequency f trvel t speed c in vcuum. Wht describes the wvelength nd speed of electromgnetic wves of frequency f / 2? wvelength speed in vcuum λ / 2 c / 2 λ / 2 c 2λ c 2λ 2c 972/3/M/J/3 23 Ornge light hs wvelength of 6 nm. 972/3/M/J/3 Wht is the frequency of this light? 8 GHz 8 Hz 5 THz 5 khz 26 sound wve hs y t distnce x from its source t time t. 972/3/M/J/3 Which grph correctly shows the mplitude nd the wvelength λ of the wve? y λ y λ distnce x distnce x y λ y λ time t time t

31 PhysicsndMthsTutor.com 25 When the liquid crystl disply of clcultor is observed through polrising film, the disply chnges s the film is rotted. Which property describes the rdition from the clcultor disply? 972/3/M/J/3 unpolrised longitudinl wve trnsverse wve wve with 3 cm wvelength 4 wve hs frequency of 5 GHz. 972//M/J/3 Wht is the period of the wve? 2 μs 2 ns 2 ns 2 ps 25 The digrm shows sketch of wve pttern, over short period of time. 972//O/N/3. m Which description of this wve is correct? The wve is longitudinl, hs wvelength of 2 cm nd is sttionry. The wve is trnsverse, hs wvelength of 2 cm nd is sttionry. The wve is trnsverse, hs wvelength of 4 cm nd is progressive. The wve is trnsverse, hs wvelength of 4 cm nd is sttionry. 26 Which sttement bout light wve nd sound wve is correct? 972//O/N/3 oth cn be polrised. oth cn trvel through free spce. oth hve frequency inversely proportionl to their wvelength. oth hve n intensity proportionl to their mplitude.

32 PhysicsndMthsTutor.com 3 When plne-polrised light of mplitude is pssed through polrising filter s shown, the mplitude of the light emerging is cosθ. 972//O/N/3 mplitude intensity I θ plne-polrised light mplitude cos θ polrising filter The intensity of the initil bem is I. Wht is the intensity of the emerging light when θ is 6.?.25 I.5 I.75 I.866 I 25 The grph shows how the height of the wter surfce t point in hrbour vries with time t s wves pss the point. height 972/3/O/N/3 men height p t q Wht re p nd q? p q period wvelength mplitude period mplitude wvelength

33 PhysicsndMthsTutor.com 24 Electromgnetic wves from n unknown source in spce were found to be significntly diffrcted when pssing through gps of the order of 5 m. Which type of wve re they most likely to be? 972/3/O/N/3 rdio wves microwves infr-red wves ultrviolet wves 25 cthode-ry oscilloscope (c.r.o.) displys wveform corresponding to sound wve. In order to determine the frequency of the sound wve, which prt of the displyed wveform must be mesured nd which c.r.o. setting must be known? 972/3/M/J/4 on-screen mesurement c.r.o. setting mplitude time-bse mplitude Y-gin wvelength time-bse wvelength Y-gin 22 Which sttement bout longitudinl wves is correct? 972//M/J/4 Longitudinl wves include rdio wves trvelling through ir. Prticles in longitudinl wve vibrte t right-ngles to the direction of trnsfer of wve energy. Some types of longitudinl wve cn be polrised. Sttionry wves cn be produced by the superposition of longitudinl wves. 23 The order of mgnitude of the frequency of the longest-wvelength ultrviolet wves cn be expressed s x Hz. Wht is the vlue of x? //M/J/4

34 PhysicsndMthsTutor.com 26 Wht is the pproximte rnge of frequencies of infr-red rdition? 972/3/M/J/4 3 Hz to 9 Hz 9 Hz to Hz Hz to 4 Hz 4 Hz to 7 Hz 27 smll source emits sphericl wves. 972/3/M/J/4 source r P The wve intensity I t ny point P, distnce r from the source, is inversely proportionl to r 2. Wht is the reltionship between the wve mplitude nd the distnce r? 2 r r r 2 4 r 24 The speed v of wves in deep wter is given by the eqution v 2 = gλ 2π 972//M/J/4 where λ is the wvelength of the wves nd g is the ccelertion of free fll. student mesures the wvelength λ nd the frequency f of number of these wves. Which grph should he plot to give stright line through the origin? f 2 ginst λ f ginst λ 2 f ginst λ f 2 ginst λ

35 PhysicsndMthsTutor.com 23 sound wve consists of series of moving pressure vritions from the norml, constnt ir pressure. The grph shows these pressure vritions for two wves t one instnt in time. 972/2/M/J/4 pressure vrition / 2 P 3. wve 2 wve distnce / m Wve hs n intensity of.6 6 W m 2. Wht is the intensity of wve 2? W m W m W m W m 2 24 The digrm shows verticl cross-section through wter wve moving from left to right. t which point is the wter moving upwrds with mximum speed? 972/2/M/J/4

36 PhysicsndMthsTutor.com 22 Wht, to two significnt figures, re the period, the frequency nd the mplitude of the wve represented by the grph? / mm 972/2/M/J/ time / ms period / s frequency / Hz mplitude / m Which sttement bout wves is correct? 972/3/O/N/4 ll electromgnetic wves trvel t the sme speed in vcuum. Longitudinl wves cn be polrised. The mplitude of wve is directly proportionl to the energy trnsferred by the wve. The frequency of infr-red light is greter thn the frequency of ultr-violet light. 24 Which sttement describes sitution when polristion could not occur? 972//O/N/4 Light wves re reflected. Light wves re scttered. Microwves pss through metl grid. Sound wves pss through metl grid. 25 sttionry sound wve is produced in tube. 972//O/N/4 Which sttement describes the wve speed? It is the distnce between two djcent nodes divided by the period of the wve. It is the speed t which energy is trnsferred from one ntinode to n djcent ntinode. It is the speed of prticle t n ntinode. It is the speed of one of the progressive wves tht re producing the sttionry wve.

37 PhysicsndMthsTutor.com 27 The vrition with distnce x of the intensity I long sttionry sound wve in ir is shown by the following grph. 972/3/O/N/4 I x / cm The speed of sound in ir is 34 m s. Wht is the frequency of the sound wve? 7 Hz 227 Hz 34 Hz 68 Hz 28 Plne wvefronts in ripple tnk pss through gp s shown. 972/3/O/N/4 P Q Which property of the wve will be different t Q compred with P? velocity frequency mplitude wvelength 22 Which sttement bout electromgnetic rdition is correct? 972//O/N/4 of wvelength 5 9 m re high-energy gmm rys. of wvelength 3 8 m re ultr-violet wves. of wvelength 5 7 m re infr-red wves. of wvelength 9 7 m re light wves.

38 PhysicsndMthsTutor.com 23 When sound trvels through ir, the ir prticles vibrte. grph of ginst time for single ir prticle is shown. 972//O/N/4 T 2T time Which grph best shows how the kinetic energy of the ir prticle vries with time? kinetic energy kinetic energy T 2T time T 2T time kinetic energy kinetic energy T 2T time T 2T time 24 Two light wves of the sme frequency re represented by the digrm. 972/2/M/J/ phse ngle / Wht could be the phse difference between the two wves?

39 PhysicsndMthsTutor.com 25 cthode-ry oscilloscope (c.r.o.) is used to disply the trce from sound wve. The time-bse is set t 5 μs mm. 972/3/M/J/5 cm Wht is the frequency of the sound wve? cm 6.7 Hz 67 Hz 6.7 khz 67 khz 26 wve pulse moves long stretched rope in the direction shown. 972/3/M/J/5 P Which digrm correctly shows the vrition with time t of the s of the prticle P in the rope? s s t t s s t t 25 sound wve hs speed of 33 m s nd frequency of 5 Hz. 972/2/M/J/5 Wht is possible distnce between two points on the wve tht hve phse difference of 6?.3 m. m 2.2 m 6.6 m

40 PhysicsndMthsTutor.com 28 Which electromgnetic wve would cuse the most significnt diffrction effect for n tomic lttice of spcing round m? infr-red 972/3/M/J/5 microwve ultrviolet X-ry 24 sound wve moves with speed of 32 m s through ir. The vrition with time of the of n ir prticle due to this wve is shown in the grph. 972//M/J/5 / mm time / ms.2 Which sttement bout the sound wve is correct? The frequency of the wve is 5 Hz. The grph shows tht sound is trnsverse wve. The intensity of the wve will be doubled if its mplitude is incresed to.4 mm. The wvelength of the sound wve is.28 m. 25 wve of frequency 5 Hz trvels t 24 m s through medium. 972//M/J/5 Wht is the phse difference between two points 2 m prt? There is no phse difference. They re out of phse by qurter of cycle. They re out of phse by hlf cycle. They re out of phse by.8 of cycle. 26 wve of mplitude hs n intensity of 3. Wm //M/J/5 Wht is the intensity of wve of the sme frequency tht hs n mplitude 2? 4.2 Wm 2 6. Wm 2 9. Wm 2 2 Wm 2

41 PhysicsndMthsTutor.com 27 n electromgnetic wve hs wvelength tht is numericlly of the sme order of mgnitude s the dimeter of nucleus. In which region of the electromgnetic spectrum does the wve occur? 972//M/J/5 gmm ry X-ry visible light infr-red