Question

Why is the sky red at dusk and done, but blue durning the day, and black at night?

Answer 1

Because the sun is low on the horizon.

Step-by-step explanation:

sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes.

Answer 2

Why is the sky blue in the day but reddish in the evening?

Step-by-step explanation:

Small particles of dust and pollution in the air can contribute to (and sometimes even enhance) these colors, but the primary cause of a blue sky and orange/red sunsets or sunrises is scattering by the gas molecules that make up our atmosphere. ... In this way, clouds act as a screen on which nature's colors are painted.

Why is the sky blue in the day but reddish in the evening?