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65.0° Air ( n= 1.00)
40.0°
Unknown liquid Light Source
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C
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A B
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air n1 = 1.00
40°
lucite n2 =
1.40 ? Plane mirror
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W4 a laboratory, light rays are observed as they pass through different transparent mediums
X
with different indices of refraction. The angle of incidence entering each medium is the same. 30°
30°
Medium1
30°
Medium 2
n1
Medium 3
n2
n3
According to the diagrams above, which of the following is correct?
A)
n1 > n2 > n3
C)
n1 < n3 < n2
B)
n1 < n2 < n3
D)
n2 > n1 > n3
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65.0° Air ( n= 1.00)
40.0°
Unknown liquid Light Source
10.
You are standing at the edge of a swimming pool and can see an object at the bottom of the pool. A light ray coming from the object enters your eye after forming an angle of 43 with the surface of the water. You are 1.8 m tall and the ledge of the pool is 0.5 m above the surface of the water. The pool is 2 m deep. °
How far away from the wall is the object: a) actually b) apparently ?
43
n air
n
Object
= 1.00
ater
= 1.33
11.
An aquarium is filled with water (n = 1.33). A glass block (n = 1.60) is supported in the water. A ray of light is directed towards the glass block. If the angle of refraction in the glass is 24°, what must be the angle of incidence in the air?
AIR
WATER
GLASS
24°
12.
In the laboratory, a light ray passes through two liquids, one floating on top of the other, in a beaker. The angle of refraction in the water is 25°. What is the value of the angle of incidence A?
Air : n = 1.0
Mineral oil : n =
Water : n = 1.33 25°
13.
A diamond is placed in a container of water as shown in the diagram below. A light ray, from air, hits the water with an angle of incidence of 60° before reaching the water-diamond surface. What is the angle of refraction, R, once the light ray enters the diamond? Incident ray
60°
Air Water
= 1.00
nair
= 1.33
nwater
Diamond
R
= 2.42
ndiamond
14.
A pelican is flying above sea level in search search of its next snack. snack. It sees a fish fish at an angle of 40° to to the horizontal, as shown below. The fish fish is located 1.0 m away, horizontally, horizontally, from the buoy. The height of the pelican above the water is equal to the depth of the fish. What is the height of the pelican above sea level?
h nair = 1.00
40°
Sea level
nwater = 1.33 h
1.0 m
8
o
o
Answers 1) 1.41 2) 1.56 x 10 m/s 3) EOD, AOB 4) C 5) 63 6a) Flint Glass b) 40 o 7) 14.4 m 8) D 9) 45 10a) 3.7 m b) 4.6 m 11) 41o 12) 34o 13) 21o 14) 1.4 m