Question

Show that incident ray and emergent  

       ray of light are parallel to each other,  

      when light is incident obliquely on a  

      rectangular glass slab. Also define  

      lateral displacement

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Answer 1

Answer:

in the following figure a light ray travelling in air is incident in the rectangular glass slab it get refracted and bends towards the normal..... these rays are parallel because the extent of bending on the opposite and parellel faces of slab is equal and opposite

Explanation:

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