Physics1410_Chapter_16_practice_questions 1

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Chapter 016 Light Waves and Color 1. Which of the following colors has the shortest wavelength? A. Yellow. B. Orange. C. Red. D. Green. 2. Which of the following is not an electromagnetic wave? A. Sound. B. Microwaves. C. Infrared. D. X-ray. E. Light. 3. The primary difference between infrared and visible light is that A. they have different amplitudes. B. infrared travels faster than visible light. C. they have different wavelengths. D. infrared does not have a magnetic field associated with its electric field. E. no materials currently known have the ability to reflect infrared. 4. For visible light, which property of visible electromagnetic waves changes with color? A. Amplitude. B. Frequency. C. Wavelength. D. Amplitude and frequency. E. Frequency and wavelength.
5. The light from an incandescent bulb is composed of A. only red, green, and blue light. B. only red, yellow, and turquoise. C. only red and blue. D. all wavelengths in the visible portion of the electromagnetic spectrum. E. None of the choices is correct. 6. The wavelength of red light is ______ that of a green light. A. greater than B. less than C. the same as D. greater than, the same as, or less than, depending on a source of light 7. The frequency of blue light is ______ that of green light. A. greater than B. less than C. the same as D. greater than, the same as, or less than, depending on a source of light 8. Which two primary colors can be added to produce yellow? A. Red and blue. B. Green and magenta. C. Red and green. D. Blue and green. E. Pink and mauve. 9. What primary color must be added to magenta light to produce white light? A. Red. B. Green. C. Yellow. D. Magenta. E. Blue.
10. The normal human eye can detect colors whose wavelengths range from 400 nm to A. 550 nm. B. 600 nm. C. 650 nm. D. 700 nm. E. 750 nm. 11. The evening sunsets are reddish orange because the atmosphere A. is most efficient at scattering red light. B. absorbs blue light. C. is more efficient at scattering blue light. D. absorbs the red light. E. contains small amounts of red dust that give the air its red color. 12. When you look at a white light through a blue piece of glass, you observe blue light. This means that the blue glass A. absorbs all of the blue light. B. reflects all of the blue light. C. transmits all colors except blue. D. transmits only the blue light. E. transmits only cyan and magenta. 13. A property of electromagnetic waves that makes them different than other kinds of waves such as sound or water waves is that A. they are transverse waves. B. they do not require a medium. C. their speed can change when moving in different media. D. they have many possible wavelengths.
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14. The correct value for the speed of light in air is A. 1.86 × 10 5 feet/s. B. 3.0 × 10 5 m/s. C. 1.86 × 10 5 miles/h. D. 3 × 10 8 m/s. E. 3 × 10 5 km/h. 15. Under the correct conditions, two light waves can produce regions of reinforcement and regions of cancellation. This phenomenon is known as A. polarization. B. interference. C. reflection. D. refraction. 16. Two light waves combine and produce a region of darkness. Which of the following must be true? A. The waves were a half-wavelength out of phase. B. The waves had different wavelengths. C. The waves came from the same source. D. The waves were unpolarized. 17. Which of the following waves exhibit interference? A. Sound. B. Water. C. Light. D. Sound, water, and light. E. None of the choices.
18. A common use of a diffraction grating is to A. split light into different polarizations. B. separate light into its separate wavelengths. C. reflect light into a different direction. D. focus light onto the retina. 19. The polarization of a light wave is determined by the direction A. of the light's velocity. B. perpendicular to both the electric and magnetic fields. C. of the oscillating electric field. D. of the fluorescent tube used as a light source. 20. One common way to polarize a beam of light is to A. filter out the longest wavelengths of the spectrum. B. filter out the shortest wavelengths of the spectrum. C. slow it down using a piece of glass. D. use a sheet of Polaroid material. 21. When unpolarized light passes through a polarizing filter, A. all the light passes through and remains unpolarized. B. all the light passes though and is now polarized. C. about half the light passes through and remains unpolarized. D. about half the light passes through and is now polarized. E. it is completely absorbed by the filter. 22. Radio waves have ________ wavelength and __________ frequency relative to visible light. A. shorter; smaller B. shorter; larger C. longer; smaller D. longer; larger
23. Ultraviolet light has ________ wavelength and __________ frequency relative to visible light. A. shorter; smaller B. shorter; larger C. longer; smaller D. longer; larger 24. Prisms and diffraction gratings can both A. change sunlight into a single color. B. invert a light ray's frequency and wavelength C. break the incoming light beam into its constituent colors. D. slow down light to a few meters per second, if used back-to-back. 25. An unpolarized beam of light of a single pure color can be split apart into two separate beams by using A. a birefringent material like calcite. B. the human retina. C. metal-ceramic inversion. D. a thin layer of oil. 26. Magenta, yellow, and cyan are the colors used in ____________ color mixing. subtractive 27. The light-sensitive cells in our eyes that allow us to see color are called ___________. cones 28. Infrared waves have a ___________ wavelength than microwaves. shorter 29. When white light shines through a diffraction grating, the blue fringes are __________ the central bright spot than the red fringes. closer to
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