Powers of a Telescope

Powers of a Telescope - Powers of a Telescope There are...

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Powers of a Telescope There are three features of a telescope that enable them to extend the power of our vision: a telescope's superior light-gathering ability enables us to see faint objects, a telescope's superior resolving power enables us to see even the tiniest of details, and the magnification power enables us to enlarge tiny images. Department stores and camera shops which do not know anything about telescopes, loudly proclaim their telescope's magnifying power. Magnification is the least important power of a telescope. Amateur and professional astronomers know that the light- gathering power and resolving power are the most important. These two abilities depend critically on the objective, so they make sure the optics of the objective are excellent. Light-Gathering Power The ability of a telescope to collect a lot more light than the human eye, its light-gathering power , is probably its most important feature. The telescope acts as a ``light bucket'', collecting all of the photons that come down on it from a far away object. Just as a bigger bucket catches
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Powers of a Telescope - Powers of a Telescope There are...

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