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When does the colour of sky appear black for an observer? |
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Answer» 1. In the absence of atmosphere, there will not be any scattering of light and so light will reach our eye, i.e. the sky will appear black instead of blue at night in the absence of light. 2. On the moon, since there is no atmosphere, there is no scattering of sunlight reaching the moon surface. Hence to an observer on the surface of moon, no light reaches except the light directly from sun. Thus sky will have no colour and will appear black to an observer on the moon surface. This is applicable for any planet which does not have atmosphere. 3. When an astronaut goes above the atmosphere of the earth in rocket he sees the sky black. |
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