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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
Give the meaning of the term VIBGYOR. With which phenomenon is it connected?
Which colour of the spectrum has
longest wavelength,
Why does the sky appear dark (or black) to an astronaut instead of blue?
Why does the sun appear red at sunset?
The red colour of the sun at the time of sunrise and sunset is because:
(a) red colour is least scattered
(b) blue colour is least scattered
(c) red colour is most scattered
(d) blue colour is most scattered
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:
Twinkling of stars
What is the colour of the clear sky during day time? Give reason for it.
Which of the following statements is correct regarding the propagation of light of different colours of white light in the air?
