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The earth day and night occurs due to a) revolution of earth around its own axis. b) revolution of sun c) revolution of earth around sin d) rotation of earth Please explain

The earth day and night occurs due to 
a) revolution of earth around its own axis.
b) revolution of sun 
c) revolution of earth around sin
d) rotation of earth
 
Please explain

Grade:12th pass

1 Answers

Eshan
askIITians Faculty 2095 Points
5 years ago
Dear student,

For time scale as short as 24 hours, the revolution of earth around the sun is very small. So the sun can be assumed to be at same position from earth, but due to revolution of earth around its own axis, once a point on surface of earth will face the sun(daytime) and due to the rotation, after around 12 hours, it would be at the exact opposite side(nightime).

Hope it helps.

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