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प्रश्न
Why does the sun appear red at sunset?
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उत्तर
At sunset, the sun is near the horizon; hence, sunlight has to travel a longer distance through the atmosphere to reach us. During this journey, most of the blue colour present in sunlight, which has a shorter wavelength, gets scattered from our line of sight. Thus, the red colour present in sunlight, which has a longer wavelength and gets scattered the least, reaches our eye. As we see red colour everywhere overhead, the sun and the surrounding sky appear red at sunset.
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संबंधित प्रश्न
Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.
Why does the sky appear dark (or black) to an astronaut instead of blue?
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.
The danger signal is red. Why?
In white light of sun, maximum scattering by the air molecular present in the earth’s atmosphere is for ______.
Which colour of white light is scattered the least? Give reason.
Why is the colour of the clear sky blue?
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
The colour of clear sky from the earth appears blue but from the space it appears black. Why?
