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Name: Yogeraj
Status: student
Age: 20s
Location: N/A
Country: N/A
Date: Thursday, April 25, 2002


Question:
Why is light from the sun partially polarized and not fully polarized?


Replies:
Sunlight is polarized because it is scattered by electrons in air molecules. The electrons are made to vibrate in directions perpendicular to the sunbeam and reradiate the light mainly in a direction perpendicular to the motion of the electron (not at all in the direction along the electron's movement.

So light coming directly toward you, at noon for example, is unpolarized. It becomes more polarized as you look in directions perpendicular to the sun's rays. At sunset if you look straight up in a direction perpendicular to the sun's rays, however, it is still not fully polarized because some of the light is scattered more than once before it reaches your eyes.

Best, Dick Plano...



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