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Where do the sun's rays strike Earth most directly and least directly?

1 Answer
Jan 15, 2017

Answer:

Least-direct- inclination : latitude + #23.4^o#.
Most-direct-inclination : latitude-- #23.4^o#
See explanation.

Explanation:

In a period of 1 year, the angle of incidence of solar rays at latitude

#theta^o (N or S)# oscillates in #[theta-23.4, theta+23.4]^o#.

South or north of the equator,, it is direct over-head strike, twice in a

year, if the

latitude #<=# the obliquity ( tilt angle of the polar axis ) = #23.4^o#,

nearly.