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प्रश्न
Why does the sun appear red at sunrises and sunset?
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उत्तर
At the time of sunrise and sunset, the light from sun has to travel the longest distance of atmosphere to reach the observer. The light travelling from the sun loses blue light of short wavelength due to scattering, while the red light of long wavelength is scattered a little, so is not lost much. Thus blue light is almost absent in sunlight reaching the observer, while it is rich in red colour.
संबंधित प्रश्न
Name a natural phenomenon which is caused by the dispersion of sunlight in the sky.
What did Newton demonstrate by his experiments with the prism?
Which colour of light has the shorter wavelength − red or violet?
Name some everyday objects:
which absorb all the colours in sunlight
What is the colour of the sunlight scattered by the air molecules in the atmosphere?
Sunset is red because at that time the light coming from the sun has to travel:
(a) lesser thickness of earth's atmosphere
(b) greater thickness of earth's atmosphere
(c) varying thickness of earth's atmosphere
(d) along the horizon
The clouds are seen white. Explain
Name the point on the lens through which a ray of light passes undeviated.
The bluish colour of water in deep sea is due to ____________.
Is the position of a star as seen by us its true position? Justify your answer.
