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European Journal of Physics Education

Yıl 2012 , Cilt 3 , Sayı 1

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Başlık :

Determination of the declination of the sun on a given day

Yazar kurumları :
Dept. of Physics Govt College for Wome1, Dept. of Physics Bangalore University2
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Özet Türkçe :

In this article we discuss a novel and low cost experiment to determine the angle of declination of the sun on a chosen day. The declination of the sun varies from + 23.5 degrees to - 23.5 degrees in the course of one year. If the zenith angle of the sun is measured as a function of its hour angle on a particular day, it is possible to calculate the angle of declination by using of spherical trigonometric relationship between them. The zenith angle is determined by using the shadow length of a vertically placed rod. The hour angle is determined from the position of shadow as a function of time. The value of solar declination may be compared with that available in almanacs.

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