Question

What is the colour of the clear sky during day time? Give reason for it.

Answer 1

Answer: Clear sky appears blue.

Reason: When sunlight passes through the atmosphere having the molecules of air and other fine particles, whose size is smaller than the wavelength of visible light, these molecules and particles scatter the blue colour more strongly than the other colours of spectrum as the wavelength of blue colour is more. This scattered blue light enters our eye. So, the colour of sky appears blue to us during day time.

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Answer 2

The colour of the sky during the day-time is blue because the molecules in the air scatter blue light more than the red light because the wavelength of the blue light is shorter than the other light.

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