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Question
A beam is composed of red and green rays. It is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from :
A beam is composed of red and green rays. It is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from :
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Solution
The correct option is A two points and propagating in two different parallel directions
We know that in any medium except vacuum or air, the velocities of different colours are different. Therefore, both red and green colours are refracted at different angles of refraction. So, after emerging from glass slab through opposite parallel faces, they appear at two different points and move in two different parallel direction.
We know that in any medium except vacuum or air, the velocities of different colours are different. Therefore, both red and green colours are refracted at different angles of refraction. So, after emerging from glass slab through opposite parallel faces, they appear at two different points and move in two different parallel direction.
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