How do you measure the tilt of the earth?

1 Answer
Jul 7, 2016

At summer solstice (about June 22) noon, if your height is h, shadow length is l and your are at latitude #theta^o N#, the tilt angle is #(tan^(-1)(l/h)-theta)^o#.,

Explanation:

The angle of incidence of light rays for latitude #theta^o N# varies

periodically, over a year as period, from

'#theta #+ tilt angle', at noon on summer solstice (about June 22) to

'#theta #- tilt angle', at noon on winter solstice (about December 21),

and back to

'#theta #+ tilt angle', for the next summer solstice.

Use, tan (angle of incidence of solar rays)=(length of the

shadow)/(height), at noon.