Unit one Lesson (1) Oscillatory motion
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1 Unit one Lesson (1) Oscillatory motion 1- Complete the following sentences:- 1. There are two types of periodic motion which are., The velocity of oscillating body reaches its maximum value when it passes by 3. Simple harmonic motion is an example of 4. Measuring unit of amplitude is while that of frequency is.. 5. Complete oscillation comprises.successive displacements, each one is called.. 6. When oscillating body makes 600 complete cycles per minute, its periodic time while its frequency.. 7. F= 8. T= 9. In microwave oven,oscillating molecules of that present in food vibrate by effect of 10. Amplitude of simple pendulum equal.of complete oscillation. 11. The result of multiplying frequency of an oscillating body by its periodic time equal ,,..from types of oscillatory motion. 13. Megahertz = Hz 2- What is meant by :- 1. Periodic motion: 2. Oscillatory motion: Complete oscillation: 4. Periodic time of oscillating body equal 0.5 sec 5. Frequency of tuning fork is 70 Hz Amplitude of oscillating body equal 2cm 7. Time taken by spring to make 50 complete oscillation is 1 minute. 8. No. of complete oscillations made by oscillating body in 5sec is 500 complete oscillations.. 9. The oscillating body make 240 oscillation in half minute.... 1
2 3- Give reason for:- 1. Oscillatory motion is considered periodic motion.. 2. Motion of spring is considered as an oscillatory motion. 3. Periodic time decreases as the number of complete oscillations increases Metallic pots are not used in microwave ovens... 4-Mention the mathematical relation between:- 1- Amplitude and complete oscillation of an oscillating body. 2-frequency and periodic time. 2
3 Lesson (2) 1-Complete:- When tuning fork oscillates is generated which travels in form of sound waves Waves are classified according to the ability of propagation and transfer energy into. And The mechanical waves are classified into.. and.. Radio waves are considered waves that propagate through free space with a velocity of Transverse waves consist of.. and.. In the.. waves,the particles of the medium oscillate perpendicular to the wave propagation direction, while in the waves,the particles of the medium oscillate along the wave propagation direction The longitudinal wave consists of. And. The crest in the wave is equivalent to the.. in the longitudinal wave The wavelength of the transverse wave is the distance between The wave length of the longitudinal wave us the distance between. Transverse wave consists of and. Longitudinal wave consists of and. If the distance between the center of the third compression and the fifth one on the propagation is 20 cm,so the wavelength of this wave is 2-GR 1-The wave produced due to vibration of a string are transverse mechanical waves 2-we see lightning before hearing thunder 3-what is meant by? 1-Wavelength of sound wave is 30 cm 2-the distance that is covered by a visible light waves in two second is 6*10^8 4-What happens when? 1-the particles of medium vibrate in the direction normal to the direction of propagation 2-the frequency of wave is doubled when the wave velocity is constant 3-the frequency & velocity of wave propagation decreases to quarter 3
4 1- complete the following Unit 2: Light 1. Light is..waves that travel through free space. 2. The light velocity is the distance. 3..is the main source of light energy on earth surface. 4. Range of wavelength of visible light between.to nanometer 5. White light consist of.colours 6. Light waves consist of and.. 7. Glass Prism used to analyze into. 8.,,.,,..., are spectrum colours 9...nearest colour to prism apex, while.is the nearest colour to prism base colour has the highest frequency and shortest wave length. 11..colour has the lowest frequency and longest wave length. 12. The frequency of blue colour is..than frequency of yellow colour, so the energy of yellow light photon is..than energy of blue light photon. 13. The scientist proved that energy of light waves is composed of energy quanta called Energy of photon =.x 15. Light use in home decoration like.to illuminate aircrafts,.for reading 16. Media classified according to their ability to allow light to pass through into.. medium, medium, mdium 17...,.example for transparent medium while,..,.. examples for opaque medium,while., example for translucent one. 18. By increasing..of transparent medium,the quantity of light passing through it 19. Light travel through..media in lines 20. Energy of photon is..proportional with Light intensity of surface is.proportional with.between.and As distance between light source and surface increase twice, the intensity of light..to 23. Medium which doesn't permit light to pass is called 2- write the scientific term:- 4
5 1. Distance covered by light in one second 2. Structure used to analysis of light 3. Scientist prove that energy of photon depends on its frequency 4. Physical quantity equal plan's constant is multiplied by frequency 5. Medium don't allow light ray to penetrate 6. Media allow passage part of light and absorb the other 7. The amount of light falling perpendicular to unit area in one second 8. Light intensity of surface is inversely proportional to square of distance between surface and light source 3- give reason for:- 1. Energy of red light photon is less than that of orange light photon 2. Energy of violet photon is the maximum energy in spectrum colours 3. Wood doesn't allow passage of light through it 4. The inability to see the impurities present in black honey 5. It is preferred to install mercury bulbs in car 's headlights 6. Clear glass is transparent medium 4-what happen when:- 1. Incidence of white light ray on a face of triangular glass prism 2. thickness of transparent medium increases concerning to quantity of light passes through it. 5
6 .1 6
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