Posted by **Dhawal** on Tuesday, April 17, 2007 at 4:21am.

Compare the light gathering power of a telescope with a 10-centimeter(about 4-inch) diameter mirror to that of the human eye. (Take a diameter of the pupil of the eye to be about 5 millimeters)

Wouldn't the power be related to the AREA of the optical window in the telescope?

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