Some Important wonders of light

First intresting fact is that When we are seeing son wee are seeing the past of sun

Because a ray of Sunight needs 8 minutes to travel to earth 

So we see the image of sun before 8 minutes

We see how it is before 8 minutes

 Also we see the sun some what enlarged during sunrise and sun set due to refraction

Mirrages are formed due to total internal reflection.The Light rays starts bouncing back without getting passed

Water drop in oil emits different colours due to total internal reflection of light.

Rainbow is formed due to dispersion of light.

A Metal Rod  in glass of water seems to be enlarged due to Refraction of light.