The variation in the length of daylight

It is a well-known fact that the number of hours of daylight varies with the time of year, except at points on the equator. It is sometimes thought that at latitudes between the Arctic and Antarctic circles the variation takes the form of a sine curve. However there is no theoretical basis for this...

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Bibliographic Details
Published in:The Mathematical Gazette
Main Author: Ling, J. F.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1989
Subjects:
Online Access:http://dx.doi.org/10.2307/3619300
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002555720014553X
Description
Summary:It is a well-known fact that the number of hours of daylight varies with the time of year, except at points on the equator. It is sometimes thought that at latitudes between the Arctic and Antarctic circles the variation takes the form of a sine curve. However there is no theoretical basis for this idea, although it is true that a sine curve may give quite a good approximation.