Question

A coin in a glass beaker appears to be raised. Explain why this happen

Answer 1

it happens due to apparent depth phenomenon

in order other words,the objects which are in different medium appears to be raised or settled down.

formula to find apparent depth is

Answer 2

the coin appears to be raised because of the refraction of light

since light is travelling from a denser medium i.e. glass to a rarer medium, it bends away from the normal and makes a perspective that the coin is raised up when viewed from an angle

hope that helped...