Place a pencil in the water.
Look through the side of the glass at the pencil - what do you see?
The pencil looked bent because light travels slower through water than it does through air. This causes the light rays to bend - refraction.
Crooked Pencil
Place a pencil in the water.
Look through the side of the glass at the pencil - what do you see?
The pencil looked bent because light travels slower through water than it does through air. This causes the light rays to bend - refraction.