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प्रश्न
The colour of sky, in direction other than of the sun, is blue. Explain.
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उत्तर
As the light travels through the atmosphere, it gets scattered in different directions by the air molecules present in its path. The blue light due to its short wavelength is scattered more as compared to the red light of long wavelength. Thus the light reaching our eye directly from the sun is rich in red colour, while the light reaching our eye from all other directions is the scattered blue light. Therefore, the sky in a direction other than in the direction of the sun is seen blue.
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संबंधित प्रश्न
What is meant by dispersion of white light? Describe the formation of rainbow in the sky with the help of a diagram.
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
Name the phenomenon due to which the stars seem higher in the sky than they actually are.
What happens when a beam of sunlight enters a dusty room through a window? Explain your answer.
In an experiment to study the scattering of light by passing a beam of white light through a colloidal solution of sulphur in a transparent glass tank:
Which colour is observed from the front of the glass tank? Does this colour correspond to the colour of sky on a clear day or the colour of sky around the sun at sunset?
Explain why, when the sun is overhead at noon, it appears white, but when the same sun is near the horizon at sunset, it appears red.
Explain in brief the reason for the following :
Delayed sunset
What is the colour of the clear sky during day time? Give reason for it.
Which colour of white light is scattered the least? Give reason.
Why is the Tyndall effect shown by colloidal particles?
