The sun is visible some time before sunrise and some time after sunset, the reason is not clear...

The sun looks reddish at the time of sunrise and sunset.

The sun looks reddish at the time of sunrise and sunset.

The sun is seen on the horizon a little before sunrise.

The sun is seen on the horizon for sometime even after sunset.

Sun is visible a little before the actual sunrise and until a little after a actual sunset. This is due to

The sun is visible a little before the actual sunrise because of which one of the following?

The closing of the flowers of some plants after sunset illustrates

Why does the Sun appear reddish at the time of sunset ?