Question

19. A coin kept below a glass slab appears to be raised up due to ………………….. of light​

Answer 1

Refraction of light

Explanation:

when light enters through lighter medium to denser medium then it bend towards the normal

Thats why this happens.

Answer 2

A coin kept below a glass slab appears to be raised up due to refraction of light.

• The coin is placed under two different medium, one is the glass slab and the other is air.
• So when light waves travel from one medium to another, they bend due to the difference in density of the two mediums.
• In this case when light enters from glass slab to the air, it bends away from the normal because glass is denser than air and therefore the coin appears to be raised up.