Quiz 8 - Laserlightis A B C D incandescent polarized...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Laser light is A. incandescent. B. polarized. C. coherent. D. incoherent. Points Earned: 0/1 Correct Answer: C Your Response: B 2. In a CD player, light from a laser diode enters a plastic disc and reflects from a layer of shiny aluminum. Before  it enters the plastic, the laser light has a wavelength of 780 nanometers and a frequency of  385,000,000,000,000 Hz. Once this light is inside the plastic, its wavelength A. becomes shorter but its frequency stays the same. B. stays the same but its frequency becomes lower. C. becomes longer but its frequency stays the same. D. stays the same but its frequency becomes higher. Points Earned: 0/1 Correct Answer: A Your Response: B 3. What effect causes the sky to appear blue? A. Destructive 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Interference B. Rayleigh scattering C. Impedance mismatch D. Dispersion Points Earned: 1/1 Correct Answer: B Your Response: B 4. Optical fibers work using the principle of A. diffraction limitation. B. dispersion shifting. C. erbium-doped fiber  amplification. D. total internal  reflection. Points Earned: 0/1 Correct Answer: D Your Response: C 5. A laser diode’s wavelength and color depend primarily on A. what it is hooked up to B. the density of its anode C. the band gap of its anode D. the band gap of its power  supply
Background image of page 2
Points Earned: 0/1 Correct Answer: C Your Response: B 6. When a narrow laser beam passes through a fine wire mesh before arriving at the wall, it forms a complicated  pattern of bright spots on the wall. This pattern of spots would not occur if you sent a flashlight beam through  the mesh because light from the flashlight A. cannot be sent through a single opening of the mesh. B. is vertically polarized, while laser light is horizontally  polarized. C. is horizontally polarized, while laser light is vertically  polarized. D. is neither coherent nor monochromatic. Points Earned: 0/1 Correct Answer: D Your Response: C 7. Although salt crystals are clear, a pile of salt appears to be white. This is because A. small salt grains are metallic and act as mirrors,  scattering light in all directions. B. small salt grains are more dense than large salt  crystals, and they fluoresce white light when exposed to  infrared radiation. C. small salt grains can absorb black light, leaving only  white light to be reflected. D. some light is reflected whenever light moves from a salt 
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
granule to air or vice versa. The randomly oriented  granules reflect light in all directions. Points Earned:
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 20

Quiz 8 - Laserlightis A B C D incandescent polarized...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online