Q. 355.0( 2 Votes )

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Answer :

When a ray of light passes through a glass slab, it travels from air to glass, and therefore it will bend towards the normal as air is a rarer medium and glass is a denser medium. When the ray of light moves out of the glass slab, the ray of light again bends and since it is travelling from denser to rarer medium, so it bends away from normal

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