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77.9 On the variation in the length of daylight in a simple model

Published online by Cambridge University Press:  01 August 2016

P.K. Aravind
P.K. Aravind*
Affiliation:
Physics Department Worcester Polytechnic Institute, Worcester, MA 01609 USA
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Information
The Mathematical Gazette , Volume 77 , Issue 478 , March 1993 , pp. 92 - 94
Copyright
Copyright © The Mathematical Association 1993

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References

1. Ling, J.F., “The variation in the length of daylight”. Math. Gaz. 73, 302 (1989).Google Scholar
2. See, for example, Hosmer, G.L. and Robbins, J.M., “Practical Astronomy”, (John Wiley, New York, 1931). The appendix summarizes all the principal formulae of spherical trigonometry.Google Scholar
3. Bachmann, C.H., “The equinox displaced”, Physics Teacher 28, 536 (1990); see also the letters by Pasachoff, J.M. and Allen, R. in Physics Teacher 29,71 (1991).Google Scholar
Wagon, S., “Why December 21 is the longest day of the year”, Mathematics Magazine 63, 307 (1990). An article on a related subject that may be of interest is “Solar zenith and local time from a rainbow” by Tan, A. and King, T., Physics Teacher 28, 224 (1990).Google Scholar
4. Oliver, B.M., “The shape of the analemma”, Sky and Telescope, July 1972, p.20.Google Scholar