Question

Observe the figure and write accurate conclusion regarding refraction of light.
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Answer 1

when a light ray enters a glass slab, it suffers reflection twice at the boundary separating the air and glass . The ray that finally comes out the glass slab, after suffering refraction twice is known as emergent ray. It can be seen in the image that the emergent ray is shifted parallel

to the incident ray by some distance, know as lateral displacement.

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Answer 2

Answer:

when a light ray enters a glass slab, it suffers reflection twice under bondary separating the air and glass.