Why do clouds go pink at sunset?

Answer 1

The light closer to red in the spectrum has a longer wavelength than those closer to the blue or violet end. The longer wavelengths have less energy but greater range and penetrating power. The Sun appears to set and is blocked by say a mountain range or the Ocean. The shorter wavelengths are obscurred and diffuse at short range, but the longer more reddish wavelengths still are visible. Noctilucent clouds are a very very rare phenomenon. These super high clouds, the highest type of cloud known can glow an eerie blood red sometimes an hour or more after Sunset. So high they are that the Sun's rays can still hit them directly, while an observer on the ground is out of range. Another attributing factor is the angle of the Sun relative to the observer, which is different at Sunrise and Sunset than at noon, and is responsible partly for the reddish tint you see. Same thing Sunrise as Sunset, no difference. You have an apparent 180 or 0 angle, unlike high noon which in the Summer will approximate 90 degrees.

Answer 2

The clouds go pink and red,
As they watch the sun going to bed.

Answer 3

In the atmosphere the lowest layer contains more dust particles.So,when the sun is about to set, the rays reach us through this lowest layer getting scattered by these abundant dust particles in the atmosphere. Among the many colours of the sunlight,this pink is scattered more and reaches our eye.This is the reason for the pink colour.

Answer 4

i'm pretty sure the sun's light is refracting off the clouds at a low frequency (red light). Theerefore, the clouds turn pink