The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in Figure. Which one of them is correct?
A
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B
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C
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D
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Solution
The correct option is B
Refraction:
When light passes from air to glass, it bends towards normal. When light passes from glass to air, it bends away from normal. Figure B depicts this appropriately.
The bending of light as it travels from one medium to another is known as refraction.
Refraction occurs when a light wave is an incident at an angle other than normal. Light is refracted when it passes through the interface from air to glass, where it moves more slowly.
Because the light speed varies at the interface.
When light strikes an angle, the transmitted light changes direction if the index of refraction of the two media differs. This is known as refraction.
