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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
Which color of white light is scattered the least and why?
What is the order of colours in a rainbow, from the outside to the inside?
Which light has the longer wavelength : red light or blue light?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
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?
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
Which phenomenon is responsible for making the path of light visible?
To an astronaut in a space-ship, the earth appears ______.
