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प्रश्न
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 why the Sun appears white when it is overhead at noon, but the same Sun appears red when it is near the horizon at sunset.
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उत्तर
When the sun is overhead at noon, sunlight has to travel a shorter distance through the earth's atmosphere to reach us. During this short journey of sunlight through the atmosphere, only a small amount of the blue light is scattered from the white light, keeping most of the white colour intact within it.
However, at sunset or sunrise, the sun appears red because it is near the horizon, and sunlight has to travel a relatively longer distance through the earth's atmosphere to reach us. During this long journey, most of the blue colour is scattered from our line of sight. Therefore, the light reaching our eyes consists of the colour red of sunlight, which is of longer wavelength and is scattered the least.
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संबंधित प्रश्न
Why does sun appear red at sunrise and sunset?
Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.
Why does the sun seem to rise two minutes before the actual sunrise and set two minutes after the actual sunset ? Explain with the help of labelled diagram.
Why does the sky appear dark (or black) to an astronaut instead of blue?
Out of blue light and red light, which one is scattered more easily?
Which component of sunlight is scattered away when the sun appears red at sunrise or sunset?
Complete the following statement:
When the sun is setting, the light from it has to travel a ................ thickness of the earth's atmosphere and only ................ wavelength ................ light is able to reach us. Sunset is therefore ................
Which colour of white light is scattered the least? Give reason.
Twinkling of stars is due to atmospheric
The clear sky appears blue because
