20 Physics -- Dispersion

Why is the sky blue?

Why is the sky blue?

The Short Answer:

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

Also,

According to Chemistry, Sky is covered by the layer of Ozone which is pale blue in color. So, sky appears blue in color.

Following picture also gives the reason in mathematical sense:

Close Open App