Question

why the sky appears blue? ​

Answer 1

Important Things to Know First:

Red colour:

It has a low frequency and therefore, longer wavelength.

Blue colour:

It has high frequency, therefore shorter wavelength.

Scattering of light by big particles like dust and water droplets:

They are larger than the wavelength of visible spectrum of light. So, when the sun's white light hits them, it gets reflected or scattered in such a way that it still contains all the colours of white light. So, the light appears white.

Scattering of light by tiny particles like molecules of gases present in air:

They are smaller than the wavelength of the visible spectrum of light. So, when light falls on it, it behaves differently.

These tiny particles scatter lights of higher frequency (the blues) more than the lights of lower frequencies (the reds).

Also, it is to be noted that the blues are a mixture of blue, indigo and violet.

Why does the sky appear blue ?

The sky appears blue because our atmosphere contains a large number of smaller particles of molecules of gases of air, which scatter the lights of higher frequencies (the blues) the most.

The above discussed things can also be used to describe other phenomena like:

• Appearance of sun as a red ball at evening and morning: https://brainly.in/question/2976375

Answer 2

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Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.Also, the surface of Earth has reflected and scattered the light.