Describe the annual cycle of sun angle, day length, and Earth-Sun geometry for important locations (e.g. Tropics of Cancer/Capricorn, Equator, Arctic Circle, Reno). Know how to calculate sun angle for a given latitude on an equinox/solstice.

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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Describe the annual cycle of sun angle, day length, and Earth-Sun geometry for important locations (e.g. Tropics of Cancer/Capricorn, Equator, Arctic Circle, Reno). Know how to calculate sun angle for a given latitude on an equinox/solstice.

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Sun angle is defined as the angle at which sunlight incidents on the earth surface. It varies time to time and place to place. The annual change in sun angle and day length is due to the tilt of earth's axis and revolution of earth. Since, sun apparently moves between tropics of Cancer and Capricorn throughout the year. On each point between the tropics, sunlight falls normally once in a year. 

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