4. Determine the latitude of the tangent rays of the Sun in the Northern Hemisph
ID: 286122 • Letter: 4
Question
4. Determine the latitude of the tangent rays of the Sun in the Northern Hemisphere on the following days of the year, then indicate if the latitudes north of the tangent rays in the Northern Hemisphere are receiving 24 hours of daylight or 24 hours of darkness. Remember, the circle of illumination will be the same number of degrees latitude away from the North Pole as the declination of the Sun is from the equator.
Use the anelemma and the equation Solar Altitude = 90 degrees - Arc Distance
Use the anelemma diagram at this link:
http://www06.homepage.villanova.edu/timothy.feeman/cartography/textsupp/supp01.htm
Date
Declination of Sun
Latitude of Tangent Rays of Sun (and the circle of illumination) in Northern Hemisphere
Are latitudes north of the tangent rays receiving 24 hours of daylight or 24 hours of darkness? (Choose either “daylight” or “darkness”)
March 29
3
July 3
23
October 14
8
I just need to fill in the blank squares.
Date
Declination of Sun
Latitude of Tangent Rays of Sun (and the circle of illumination) in Northern Hemisphere
Are latitudes north of the tangent rays receiving 24 hours of daylight or 24 hours of darkness? (Choose either “daylight” or “darkness”)
March 29
3
July 3
23
October 14
8
Explanation / Answer
Date
Declination of Sun
Latitude of Tangent Rays of Sun (and the circle of illumination) in Northern Hemisphere
Are latitudes north of the tangent rays receiving 24 hours of daylight or 24 hours of darkness? (Choose either “daylight” or “darkness”)
March 29
3
90-3=87o
Daylight
July 3
23
90-23=67o
Daylight
October 14
8
90-8= 72o
Date
Declination of Sun
Latitude of Tangent Rays of Sun (and the circle of illumination) in Northern Hemisphere
Are latitudes north of the tangent rays receiving 24 hours of daylight or 24 hours of darkness? (Choose either “daylight” or “darkness”)
March 29
3
90-3=87o
Daylight
July 3
23
90-23=67o
Daylight
October 14
8
90-8= 72o
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