Sun angle

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Illustration of how sunlight is spread over a greater area in the polar regions.

Sun angle is the angle of incidence at which sunlight strikes the Earth at a particular location, time of a day, and season. It controls the amount of heat energy received at this location on the globe and affects the climate due to the Earth's orbit around the sun and the Earth's rotation.

Seasonal change in the angle of sunlight, caused by the tilt of the Earth's axis, is the basic mechanism that results both in warmth of the weather and in length of the day.[1]

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