28/03/2020 Light 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 of the following waves can propagate through a vacuum?infra red wavesultrasonic waveshigh velocity sound wavesacoustic waves2. 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?200 Hz800 Hz400 Hz20 Hz3. 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 image Size of image A Only real Only magnified B Either real or virtual Either magnified or diminished C Either real or virtual Only magnified D Only virtual Only diminished ACDB4. this image shows an example of:RefractionPenumbraA broken strawReflection5. This types of mirror has a surface that curves inward:Convex MirrorLongitudinal MirrorOpaque MirrorConcave Mirror6. What frequency are 20 mm microwaves?400 MHz73 GHz15 GHz100 MHz7. How long does it take light to travel 1.0 m?3.3 s3.3 ns3.3 ms3.3 micro-s8. Which type of electromagnetic wave has the most penetrating powerUV RaysRadio wavesGamma RaysX-rays9. After randomly polarized light passes through a polarizer, it israndomly polarized.totally polarized.totally blocked.partially polarized10. If the distance from a light source to a screen is doubled, the illumination on the screen will benone quarter as muchthe samehalf as muchtwice as much11. An endoscope uses glass fibres to enable doctors to see inside a person. Rays of light travel along the glass fibres bytotal internal correctiontotal internal diffractiontotal internal reflectiontotal internal refraction12. A major property of light wave is that it isElectromagnetic in natureIn the form of longitudinal wavesPropagated in a curved lineElectrostatic in nature13. In a normal eye, light rays converge on the: PupilLensIrisRetina14. The biggest disadvantage of incandescent lighting is:It's not white lightIt's not heat efficientIt's expensiveIt's not good for the environment15. Points D and I on the wave are __________________.nodestroughspitchcrest16. 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 e5 Hz1.2 e11 Hz7.5 e14Hz1.3 e-15 Hz17. Points A and F onthe wave are ________ troughscrestnodespitch18. The main difference between a radio wave and a light wave is itsnone of the abovewavelength.speed.both19. What is the wavelength of light waves if their frequency is 5.0X1014 Hz?6.0 mm0.60 m0.06 mm0.6 micro m20. Points B, E, G, and J on the wave are _______________.pitchnodescresttroughs21. The electromagnetic waves that are sensitive to temperature changes areinfra red raysultra violet raysgamma raysX-rays22. An annular eclipse of the sun is seen by an observer at a pointin the umbra produced by the moonin the umbra produced by the earthin the penumbra produced by the moonbeyond the vertex of the umbra cone of the moon23. 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 microwavea gamma wavan ultraviolet wavean infrared wave24. What is the wavelength of a 92.9 MHz radio wave?32 m32 cm3.2 m32 mm25. Light is best described as a: ParticleParticle and WaveWavePoint26 out of 25Time is Up!