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प्रश्न
Why does the sun appear red at sunset?
उत्तर
At sunset, the sun is near the horizon; hence, sunlight has to travel a longer distance through the atmosphere to reach us. During this journey, most of the blue colour present in sunlight, which has a shorter wavelength, gets scattered from our line of sight. Thus, the red colour present in sunlight, which has a longer wavelength and gets scattered the least, reaches our eye. As we see red colour everywhere overhead, the sun and the surrounding sky appear red at sunset.
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संबंधित प्रश्न
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
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The scattering away of red light makes the sky appear blue during the day time.
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Which component of sunlight is scattered away when the sun appears red at sunrise or sunset?
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:
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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 ................
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