If you see a rainbow near the time of sunset, where in the sky will the rainbow be?
a. overhead
b. toward the eastern horizon
c. toward the western horizon
d. toward the northern horizon
e. toward the southern horizon
[Ques. 2] You see colors in a rainbow because of
a. interference.
b. diffraction.
c. specular reflection.
d. dispersion.
e. polarization.
[Ques. 3] Optical fibers work because of
a. interference.
b. diffraction.
c. total internal reflection.
d. diffuse reflection.
e. polarization.
[Ques. 4] According to the law of reflection, a light ray striking a mirror at an angle of incidence of 30 degrees will leaves the mirror at an angle of
a. 60 degrees.
b. 30 degrees.
c. less than 30 degrees.
d. none of the above.
[Ques. 5] Certain types of sunglasses are very effective at diminishing light reflected from surfaces because of
a. interference.
b. diffraction.
c. specular reflection.
d. diffuse reflection.
e. polarization.
[Ques. 6] When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of
a. interference.
b. diffraction.
c. specular reflection.
d. diffuse reflection.
e. polarization.
[Ques. 7] Thin film interference is responsible for the colors of
a. bird feathers. b. gasoline spills.
c. soap bubbles. d. all of the above.
[Ques. 8] Light spreads out when it passes through a narrow slit because of
a. interference.
b. diffraction.
c. specular reflection.
d. diffuse reflection.
e. polarization.
[Ques. 9] A helium neon laser generates light of 632.8-nm wavelength. What color is that?
a. blue b. yellow
c. red d. green
[Ques. 10] The colors of objects we see by reflected light are due to
a. interference. b. selective absorption.
c. specular reflection. d. diffuse reflection.
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