Practice Questions
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|
| 1. |
Which
of the following has the shortest wavelength? |
| (A) |
Red light |
| (B) |
Blue light |
| (C) |
Gamma rays |
| (D) |
X rays |
| (E) |
Radio waves |
|
|
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| 2. |
Orange
light has a wavelength of  m. What is its frequency? The speed of
light is  m/s. |
| (A) |
 Hz |
| (B) |
 Hz |
| (C) |
 Hz |
| (D) |
 Hz |
| (E) |
 Hz |
|
|
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| 3. |
When
the orange light passes from air (n = 1) into glass
(n = 1.5), what is its new wavelength? |
| (A) |
 m |
| (B) |
 m |
| (C) |
 m |
| (D) |
 m |
| (E) |
 m |
|
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| 4. |
When
a ray of light is refracted, the refracted ray does not have the
same wavelength as the incident ray. Which of the following explain
this phenomenon? |
|
I. Some of the energy of the incident ray is carried away
by the reflected ray
II. The boundary surface absorbs some of the energy of the
incident ray
III. The incident and refracted rays do not travel with the
same velocity
|
| (A) |
I only |
| (B) |
II only |
| (C) |
III only |
| (D) |
I and II only |
| (E) |
I, II, and III |
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| 7. |
A person’s image appears on the
far side of an optical instrument, upside down. What is the optical instrument? |
| (A) |
Concave mirror |
| (B) |
Convex mirror |
| (C) |
Plane mirror |
| (D) |
Concave lens |
| (E) |
Convex lens |
|
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| 8. |
A physicist shines coherent light
through an object, A, which produces a pattern
of concentric rings on a screen, B. A is
most likely: |
| (A) |
A polarization filter |
| (B) |
A single-slit |
| (C) |
A multiple-slit diffraction grating |
| (D) |
A prism |
| (E) |
A sheet with a pinhole |
|
|
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| 9. |
Sound
waves do not exhibit polarization because, unlike light waves, they
are not |
| (A) |
Longitudinal |
| (B) |
Coherent |
| (C) |
Dispersive |
| (D) |
Transverse |
| (E) |
Refractive |
|
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| 10. |
The
solar glare of sunlight bouncing off water or snow can be a real
problem for drivers. The reflecting sunlight is horizontally polarized,
meaning that the light waves oscillate at an angle of 90º to a normal line
drawn perpendicular to the Earth. At what angle relative to this
normal line should sunglasses be polarized if they are to be effective
against solar glare? |
| (A) |
0º |
| (B) |
30º |
| (C) |
45º |
| (D) |
60º |
| (E) |
90º |
|
|
|
, and the angle the beam of light
makes with the normal as it passes into the air is 
. The index of refraction for air
is 1 and the index of refraction for plastic is 2.
, in terms of 
?
sin
