28/03/2020Light Waves(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Light Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. 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 correction2. In a normal eye, light rays converge on the: Pupil Lens Retina Iris3. In this example of constructive interference, what increases? Frequency Wavelength Speed Amplitude4. An image in which no light rays pass through it is called a Real Image Reflection Refraction Virtual Image5. Total eclipse of the sun occurs when moon is between the sun and the earth ozone layer is threatened earth is between the moon and the sun sun is between the moon and the earth6. Which of the following is different from others gamma rays Xrays infra red rays cathode rays7. An image in which no light rays can pass through it is called: Transparent Translucent Opaque Pigment8. Which of the following waves can propagate through a vacuum? acoustic waves infra red waves high velocity sound waves ultrasonic waves9. Concave lenses are thinner in the middle and thicker at the edges so they cause light rays to _______ Converge None of the above Transverge Diverge10. Which does not normally use infra-red radiation? electric grill intruder alarm television remote controller sunbed11. Which of these colours appears in a pure spectrum of visible light? White Black Brown Yellow12. What is the wavelength of light waves if their frequency is 5.0X1014 Hz? 0.06 mm 0.60 m 6.0 mm 0.6 micro m13. Radio carrier waves are generated by causing electrons to oscillate rapidly in microphone a transmitter an antenna a television camera14. Which type of electromagnetic wave has the most penetrating power Gamma Rays Radio waves UV Rays X-rays15. The distance between A and F is the _____________. Period Frequency Wavelength Amplitude16. After randomly polarized light passes through a polarizer, it is randomly polarized. totally polarized. partially polarized totally blocked.17. 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 7.5 e5 Hz 1.3 e-15 Hz 1.2 e11 Hz 7.5 e14Hz18. A major property of light wave is that it is Electrostatic in nature In the form of longitudinal waves Electromagnetic in nature Propagated in a curved line19. The main difference between a radio wave and a light wave is its both wavelength. none of the above speed.20. Points D and I on the wave are __________________. pitch troughs crest nodes21. Shadows and eclipses result from the refraction of light reflection of light diffraction of light rectilinear propagation of light22. Which section of the electromagnetic spectrum is emitted as thermal radiation? Gamma ray Visible light Ultra-violet Infra-red23. Lenses are used in spectacles to treat some vision defects. The two main lens types are converging lenses and diverging lenses. Diverging lenses always produce virtual, diminished images.Which row of the table describes the images produced by a converging lens? Type of imageSize of image AOnly realOnly magnified BEither real or virtualEither magnified or diminished CEither real or virtualOnly magnified DOnly virtualOnly diminished D C B A24. The electromagnetic waves that are sensitive to temperature changes are gamma rays X-rays ultra violet rays infra red rays25. Points A and F onthe wave are ________ troughs crest nodes pitch26 out of 25Time is Up!