A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 20 with the normal. Find the angle of the refracted ray within the glass with respect to the normal.
a. 31
b. 0.23
c. 37
d. 13
e. 20
[Ques. 2] Water has an index of refraction of 1.333 . What is the speed of light through it? (c = 3.00 108 m/s)
a. 4.00 108 m/s
b. 2.25 108 m/s
c. 4.46 108 m/s
d. 1.46 108 m/s
[Ques. 3] When light reflects and produces a clear image, this reflection is referred to as:
a. specular reflection.
b. diffuse reflection.
c. retroreflection.
d. double reflection.
[Ques. 4] When viewing your image in a hand-held mirror, if you move the mirror away at a speed v, the image appears to:
a. also move away at v.
b. move away at 2v.
c. move away at v/2.
d. not move.
[Ques. 5] When light of one wavelength from air hits a smooth piece of glass at an angle, which of the following will not occur?
a. reflection
b. refraction
c. dispersion
d. All of the above will occur.
[Ques. 6] A line representing a wave front for a wave should be drawn:
a. from the source to the receiver.
b. from one crest to the preceding crest.
c. along one of the crests of the wave.
d. in the direction the wave is moving.
[Ques. 7] Light from a 604-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 48. What is the angle of reflection from the surface?
a. 12
b. 24
c. 48
d. 31
e. 75
[Ques. 8] Which of the following describes what will happen to a light ray incident on an air-to-glass boundary?
a. total reflection
b. total transmission
c. partial reflection, partial transmission
d. partial reflection, total transmission
[Ques. 9] As the angle of incidence is increased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value?
a. zero
b. 45
c. 90
d. 180
[Ques. 10] A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 22 with the normal. Find the angle of the ray reflected off the glass surface with respect to the normal.
a. 33
b. 50
c. 14
d. 22
e. 15
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