Question

Give reason. Print appears to be raised when a glass block is placed on it.

Answer 1

HEYA MATE HERE IS YOUR ANSWER ⤵️
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Print appears to be raised when glass block is placed on it due to refraction in the slab.The rays from the letters enter the slab and after suffering refraction bend towards the normal as it travels from an optically rarer to a denser medium.

Answer 2

This is due to refraction of light when it enters the glass slab that is when the light enters from a rarer medium to a denser medium.