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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
Which colour of the spectrum has
shortest wavelength?
Name some everyday objects:
which reflect all the colours in sunlight
Where in nature can you find evidence that white sunlight may be made of different colours?
Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.
We can see the sun before the actual sunrise by about:
(a) 5 minutes
(b) 2 minutes
(c) 2 hours
(d) 20 minutes
What is tyndall effect? Explain with an example.
Why does the sun appear red at sunset?
Name the point on the lens through which a ray of light passes undeviated.
The clear sky appears blue because:
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
