Light travelling through the air (n = 1) strikes the surface of a diamond (n = 2.42) at a large angle of incidence. Which of the following describes the light ray as it enters the diamond?
a) the light bends toward the normal to the surface, and slows down
b) the light bends toward the normal to the surface, and speeds up
c) the light bends away from the normal to the surface, and slows down
d) the light bends away from the normal to the surface, and speeds up
e) the light ray does not enter the diamond, but totally reflects and stays in the air
Solution
When light is enter into rare medium to denser medium than light rays bends towards the normal.
Light slows as it travels through a substance and every substance has an index of refraction which defined as the ratio of the speed of light in vacuum to the speed of light in that substance. The index of refraction for diamond is 2.4 which means that light is 2.4 times slower in diamond .
Hence Option A is correct.
Hope it will help you. Please rate the answer.
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Light travelling through the air (n - 1) strikes the surface of a diam.docx
1. Light travelling through the air (n = 1) strikes the surface of a diamond (n = 2.42) at a large angle
of incidence. Which of the following describes the light ray as it enters the diamond?
a) the light bends toward the normal to the surface, and slows down
b) the light bends toward the normal to the surface, and speeds up
c) the light bends away from the normal to the surface, and slows down
d) the light bends away from the normal to the surface, and speeds up
e) the light ray does not enter the diamond, but totally reflects and stays in the air
Solution
When light is enter into rare medium to denser medium than light rays bends towards the normal.
Light slows as it travels through a substance and every substance has an index of refraction
which defined as the ratio of the speed of light in vacuum to the speed of light in that substance.
The index of refraction for diamond is 2.4 which means that light is 2.4 times slower in
diamond .
Hence Option A is correct.
Hope it will help you. Please rate the answer.
