Please help show me how to solve these problems. If a material has an index of r
ID: 2111149 • Letter: P
Question
Please help show me how to solve these problems.
If a material has an index of refraction of 1.50, what is the speed of light through it?
A) 6.00 × 108 m/s
B)3.00 × 108 m/s
C)4.50 × 108 m/s
D)2.00 × 108 m/s
A light ray in air is incident on an air to glass interface at an angle of 45 ° and is refracted at an angle of 30 ° to the normal. What is the index of refraction of the glass?
A)1.23
B)1.74
C)1.31
D)1.41
)Light enters a substance from air at an angle of 32.0 °, and continues at an angle of 23.0 °. What is the index of refraction of the substance?
A)1.28
B)1.36
C)0.74
D)1.11
)Light passes from air to water. The incoming ray is at an angle of 17.0 ° to the normal. The index of refraction is 1.33. What is the angle in the water?
A)22.6 °
B)22.9 °
C)12.7 °
D)18.3 °
94)An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day. What is the angle of refraction in the water for a ray of light that has an angle of incidence of 45 ° as it enters the oil from the air above? (The index of refraction for oil is 1.15, and for water it is 1.33.)
A)32 °
B)27 °
C)39 °
D)36 °
Explanation / Answer
If a material has an index of refraction of 1.50, what is the speed of light through it?
n = c/v = 3E8/1.5 = 2E8
D)2.00 × 108 m/s
A light ray in air is incident on an air to glass interface at an angle of 45 ° and is refracted at an angle of 30 ° to the normal. What is the index of refraction of the glass?
n1 * sin(theta1) = n2 * sin(Theta2)
==> 1 * sin(45) = n2 * sin(30)
D)1.41
)Light enters a substance from air at an angle of 32.0 °, and continues at an angle of 23.0 °. What is the index of refraction of the substance?
n1 * sin(theta1) = n2 * sin(Theta2)
==> 1 * sin(32) = n2 * sin(23)
B)1.36
)Light passes from air to water. The incoming ray is at an angle of 17.0 ° to the normal. The index of refraction is 1.33. What is the angle in the water?
C)12.7 °
94)An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day. What is the angle of refraction in the water for a ray of light that has an angle of incidence of 45 ° as it enters the oil from the air above? (The index of refraction for oil is 1.15, and for water it is 1.33.)
A)32 °
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