Question

(2) A pencil dipped in water obliquely
appears bent at the surface of water. OR
When a pencil is partly immersed in water
and held in a slanting position, it appears to be
bent at the boundary separating water and air.​

Answer 1

Answer:

This phenomenon is called refraction.

Explanation:

This occurs due to increase in density of medium in which pencil is placed. Water being denser than air, refracts the pencil more.

Answer 2

••••••This phenomenon is called REFRACTION. ••••••

•••••Definition of refraction••••••

Refraction is the change in direction of light ray when passing from one medium to another.

•••••••||Explanation||•••••••

When light ray from the air enters in the medium of water which is denser than air,, then suddenly the speed of light changes causing the deviation in the direction of light ray ( light rays of the object,, i.e, here pencil) that is known as refraction.