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Class X Sciences

[papers from previous years]

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.


That happens mainly due to refraction.
Refraction is the bending of Light Rays when it enters an optically denser medium from an optically rarer medium.
Light rays from the sun while enter the earth's atmosphere it bends upwards.
This is why we see the sun(its rays) earlier than the sun actually rises.
Infact, 2 minutes before.
Had there been no atmosphere, this would not take place.
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