Why Do Shadows Change Length?

Answer

Shadows change length because of the sun changing dramatically throughout the day. The length of a shadow cast on the ground is proportional to the cotangent of the sun's elevation angle. The angle of the sun is θ relative to the horizon.
Q&A Related to "Why Do Shadows Change Length"
Shadows are cast by objects that block the path of sunlight. The length of the shadow can be measured by how much of the sunlight is being blocked from hitting the ground. In the
http://wiki.answers.com/Q/Explain_how_shadows_chan...
1. Visit the "Sun or Moon Altitude / Azimuth Table" Web page on the U.S. Naval Observatory website, or the "Altitude and Azimuth of the Sun" Web page on the Stargazing.net
http://www.ehow.com/how_8767657_determine-length-s...
If A 6 foot tall woman is walking at the rate of 4 ft/sec away from a street lamp that is 24 feet tall. How fast is the length of
http://www.chacha.com/question/if-a-6-foot-tall-wo...
I wont be able to draw the picture, but I can solve it for you. If you have trouble with the picture (and this problem in general) see this video: http://www.youtube.com/watch?v=kBfSwZAUo
http://answers.yahoo.com/question/index?qid=201309...
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