Question

Why sky is blue and rainbow is appears in seven colours​

Answer 1

Answer:

due to scattering of light in the atmosphere we able to see rainbow in 7 colours .we can see only three colours because other colour hace no long wavelength.Sky is seems to blue bcz of refraction of light .In sky blue colour has more wavelength.

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Answer 2

Answer:

Sky is blue because light coming from the sun is refracted in the atomsphere and then the blue light is scattered by the particles of atmosphere so sky appears blue.

Rainbow occurs because of the refraction of light in the atmosphere when their is rain, in each rain drop light enters and its dispersion occurs which leads to formation of seven colours and then this band of light is total internally reflected in the atmosphere and we see Seven colours in sky.