28/03/2020 Light Waves(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Light Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Which of the following waves cannot travel through a vacuum? infra red waves light waves radio waves sound waves 2. All waves except __________ waves must travel through a medium. Light Water Compressional Sound 3. After randomly polarized light passes through a polarizer, it is partially polarized totally polarized. randomly polarized. totally blocked. 4. A major property of light wave is that it is In the form of longitudinal waves Electrostatic in nature Electromagnetic in nature Propagated in a curved line 5. The wavelength of signals from a radio transmitter is 1500 m and the frequency is 200kHz. What is the wavelength for a transmitter operating at 1000kHz? 7.5 m 7500 m 300 m 15 m 6. Which of the following is different from others infra red rays gamma rays Xrays cathode rays 7. An annular eclipse of the sun is seen by an observer at a point in the umbra produced by the earth in the penumbra produced by the moon beyond the vertex of the umbra cone of the moon in the umbra produced by the moon 8. Which does not normally use infra-red radiation? electric grill intruder alarm sunbed television remote controller 9. When waves in phase combine, it is called: Constructive Combination Constructive Interference Destructive Combination Destructive Interference 10. Points B, E, G, and J on the wave are _______________. nodes troughs pitch crest 11. Total eclipse of the sun occurs when sun is between the moon and the earth earth is between the moon and the sun moon is between the sun and the earth ozone layer is threatened 12. What frequency are 20 mm microwaves? 15 GHz 100 MHz 400 MHz 73 GHz 13. The wave speed equation is v = frequency x wavelength.If the velocity of the wave is 400 m/s and the wavelength is 2m, what is its frequency? 20 Hz 200 Hz 400 Hz 800 Hz 14. An image in which no light rays pass through it is called a Refraction Real Image Reflection Virtual Image 15. This types of mirror has a surface that curves inward: Convex Mirror Longitudinal Mirror Opaque Mirror Concave Mirror 16. All electromagnetic waves travel through a vacuum at speeds that are proportional to their frequency. None of the above. the same speed. speeds that are inversely proportional to their frequency. 17. Which type of electromagnetic wave has the most penetrating power X-rays Radio waves Gamma Rays UV Rays 18. The direction of the path taken by light is called locus beam ray line 19. What property of waves is shown in the animation? longitudinal transverse light refraction 20. An image in which no light rays can pass through it is called: Translucent Transparent Pigment Opaque 21. The distance between A and F is the _____________. Period Frequency Wavelength Amplitude 22. The main difference between a radio wave and a light wave is its wavelength. both none of the above speed. 23. Points D and I on the wave are __________________. nodes pitch crest troughs 24. Radio waves belong to the class of wave whose velocity is about 3 e8 m/s 3 e6 m/s 3 e-8 m/s 340m/s 25. An endoscope uses glass fibres to enable doctors to see inside a person. Rays of light travel along the glass fibres by total internal refraction total internal diffraction total internal reflection total internal correction 1 out of 25 Time is Up! Time's up