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. The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3x108m/s the the freqency of the ultraviolet radiation is 1.2 e11 Hz 1.3 e-15 Hz 7.5 e5 Hz 7.5 e14Hz 2. The main difference between a radio wave and a light wave is its speed. none of the above wavelength. both 3. Which does not normally use infra-red radiation? television remote controller intruder alarm sunbed electric grill 4. Radio waves belong to the class of wave whose velocity is about 3 e8 m/s 3 e-8 m/s 3 e6 m/s 340m/s 5. this image shows an example of: Penumbra A broken straw Reflection Refraction 6. Points D and I on the wave are __________________. crest troughs nodes pitch 7. The direction of the path taken by light is called beam line ray locus 8. Points B, E, G, and J on the wave are _______________. nodes crest troughs pitch 9. In a normal eye, light rays converge on the: Pupil Lens Iris Retina 10. All waves except __________ waves must travel through a medium. Compressional Light Water Sound 11. An image in which no light rays pass through it is called a Reflection Refraction Real Image Virtual Image 12. An image in which no light rays pass through it is called a Real Image Virtual Image Refraction Reflection 13. All electromagnetic waves travel through a vacuum at the same speed. None of the above. speeds that are inversely proportional to their frequency. speeds that are proportional to their frequency. 14. Which of the following waves can propagate through a vacuum? infra red waves high velocity sound waves acoustic waves ultrasonic waves 15. An annular eclipse of the sun is seen by an observer at a point in the umbra produced by the moon beyond the vertex of the umbra cone of the moon in the umbra produced by the earth in the penumbra produced by the moon 16. When waves in phase combine, it is called: Destructive Combination Destructive Interference Constructive Interference Constructive Combination 17. Points A and F onthe wave are ________ crest troughs nodes pitch 18. A specific electromagnetic wave has a frequency greater than visible light. The wavelength of this wave is longer than that of X-rays. This electromagnetic wave is… a microwave a gamma wav an infrared wave an ultraviolet wave 19. Shadows and eclipses result from the refraction of light rectilinear propagation of light reflection of light diffraction of light 20. Which of these colours appears in a pure spectrum of visible light? Black White Yellow Brown 21. Total eclipse of the sun occurs when sun is between the moon and the earth moon is between the sun and the earth earth is between the moon and the sun ozone layer is threatened 22. What property of waves is shown in the animation? transverse longitudinal refraction light 23. 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? 300 m 15 m 7.5 m 7500 m 24. In this example of constructive interference, what increases? Speed Frequency Amplitude Wavelength 25. A major property of light wave is that it is Propagated in a curved line In the form of longitudinal waves Electromagnetic in nature Electrostatic in nature 1 out of 25 Time is Up! Time's up