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Question

Why we can see the sunlight for over 20 minutes even after sunset?
Asked by: Joy Wing-kai Lam

Answer

For the same reason that when the sun is overhead, you can see the sky: refraction. When passing through mixtures, light is scattered in various directions. After the light from the sun no longer directly meets your eyes, it is still passing through miles of atmosphere over your head, and being scattered all around. It is indirect lighting.
Answered by: Steve Story




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'The atomic bomb ... made the prospect of future war unendurable. It has led us up those last few steps to the mountain pass; and beyond there is different country.'

J. Robert Oppenheimer
(1904-1966)


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