| 161. |
| Which graph to the right properly
shows the relationship between the frequency of light and the
maximum kinetic energy of electrons emitted by a photoelectric plate?
Answer |
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| 162 |
A train approaches a
crossing and continuously blows its horn. Compared to the sound of
the engineer, the sound heard by the driver of a car waiting at the
crossing has Answer
|
|
A. |
higher pitch and shorter
wavelength |
C. |
lower pitch and shorter
wavelength |
|
B. |
higher pitch and longer
wavelength |
D. |
lower pitch and longer
wavelength |
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| 163. |
| The light hits the boundary between
water and air at an angle greater than the critical angle.
Which is the correct path of the light? Answer |
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| 164. |
| The light hits the boundary between
water and air at an angle less than the critical angle. Which
is the correct path of the light? Answer |
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| 165. |
A fisherman on the
bank of the river sees a fish in the water. The fish appears to
be Answer
|
|
A. |
closer to the shore
and larger than reality. |
|
B. |
closer to the shore
and smaller than reality. |
|
C. |
farther from the
shore and larger than reality. |
|
D. |
farther from the
shore and smaller than reality. |
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| 166. |
| Light is dispersed as shown in the
diagram to the right. This dispersion occurs because
Answer
|
 |
|
|
A. |
Each color of light
travels at a different speed in the glass. |
|
B. |
Each color of light
has a different amplitude. |
|
C. |
Each color of light
had a different angle of incidence. |
|
D. |
Each color of light
has a different brightness. |
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|
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| 167. |
Which phenomenon can
occur with light, but cannot occur with sound? Answer
|
|
A. |
Doppler effect |
C. |
polarization |
|
B. |
interference |
D. |
refraction |
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| 168. |
A plastic has an
absolute index of refraction of 1.45 for green light. What is the
speed of green light in the plastic? Answer
|
|
A. |
1.43 x 10 8 m/s |
C. |
4.35 x 10 8 m/s |
|
B. |
2.07 x 10 8 m/s |
D. |
6.31 x 10 8 m/s |
|
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| 169. |
| What is the angle of refraction in the
diagram to the right? Answer
A. 30o
C. 57o
B. 36o
D. 85o |
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| 170. |
When green light
shines on a photosensitive metal, no photoelectrons are emitted.
What can be done to get the metal to emit
photoelectrons? Answer
|
|
A. |
Use a brighter
source of green light. |
|
B. |
Use red light
instead of green light. |
|
C. |
Use ultraviolet
light instead of green light. |
|
D. |
Decrease the angle
at which the photons hit the surface of the metal. |
