Why does sun look lighter when it is hotter and looks orange when its less hot (rising/setting sun)?

Question

I mean why the sun looks yellowish in the mid afternoon and it the hottest time and why it looks orangish when its about set and when it rises at both times it is less hotter.

Answer 1

Its sort of a coincidence. The Sun looks red in the morning and afternoon because the light that is reaching your eyes is coming through the atmosphere at a shallow angle, and thus it passes through more of the atmosphere.

All the stuff in the air (pollutants especially) make it look more red.

In the middle of the dy the Sun is straight over head, the light needs to pass through less air, and therefore less pollution.

If you;ve ever seen the sun when there's been a forest fire in the area, it can look very red. Moreso in the morning and afternoon, but even at mid-day.

Of course it just so happens that when the Sun is coming straight down on us the rays are more intense, so it is hotter.

Answer 2

It's called as doppler effect.
http://en.wikipedia.org/wiki/Doppler_effect
It's not about heat of sun. It's about distance of the light.