[" 12) Explain win the help of a diagram,why a penail partly "],[" immersed in water appears to be bert at the water "],[" surface."]

Explain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface.

Explain with diagram ,why a rod when partialy immersed in water appears to be bent.

Explain with the help of a diagram, why a rod immersed partially in a transparent liquid appears to be bent at the surface of the liquid.