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. Which type of electromagnetic wave has the most penetrating powerRadio wavesGamma RaysUV RaysX-rays2. What frequency are 20 mm microwaves?15 GHz73 GHz100 MHz400 MHz3. Which of the following waves cannot travel through a vacuum?light wavesinfra red wavessound wavesradio waves4. 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 m300 m7500 m15 m5. Points A and F onthe wave are ________ crestnodestroughspitch6. Shadows and eclipses result from thereflection of lightrectilinear propagation of lightrefraction of lightdiffraction of light7. The biggest disadvantage of incandescent lighting is:It's expensiveIt's not heat efficientIt's not good for the environmentIt's not white light8. The direction of the path taken by light is calledbeamlocusrayline9. Total eclipse of the sun occurs whenearth is between the moon and the sunsun is between the moon and the earthozone layer is threatenedmoon is between the sun and the earth10. Concave lenses are thinner in the middle and thicker at the edges so they cause light rays to _______DivergeNone of the aboveTransvergeConverge11. The electromagnetic waves that are sensitive to temperature changes areX-raysgamma raysultra violet raysinfra red rays12. After randomly polarized light passes through a polarizer, it istotally blocked.totally polarized.partially polarizedrandomly polarized.13. In a normal eye, light rays converge on the:LensIrisPupilRetina14. The wavelength of ultraviolet radiation is 400nm. If the speed of light in air is 3x108m/s the the freqency of the ultraviolet radiation is7.5 e14Hz7.5 e5 Hz1.3 e-15 Hz1.2 e11 Hz15. This types of mirror has a surface that curves inward:Convex MirrorOpaque MirrorConcave MirrorLongitudinal Mirror16. An endoscope uses glass fibres to enable doctors to see inside a person. Rays of light travel along the glass fibres bytotal internal reflectiontotal internal refractiontotal internal diffractiontotal internal correction17. 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 diminishedBCAD18. An image in which no light rays pass through it is called aReal ImageVirtual ImageReflectionRefraction19. Points B, E, G, and J on the wave are _______________.troughsnodespitchcrest20. What is the wavelength of a 92.9 MHz radio wave?32 mm32 cm3.2 m32 m21. An image in which no light rays can pass through it is called:PigmentTransparentTranslucentOpaque22. An image in which no light rays pass through it is called aRefractionVirtual ImageReal ImageReflection23. If the distance from a light source to a screen is doubled, the illumination on the screen will benthe sametwice as muchone quarter as muchhalf as much24. The distance between A and F is the _____________.PeriodFrequencyAmplitudeWavelength25. Which does not normally use infra-red radiation?sunbedelectric grilltelevision remote controllerintruder alarm26 out of 25Time is Up!