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xiaily xiaily
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3 months ago

What is the light-gathering power of a telescope directly proportional to?



the diameter of the primary mirror or lens



the focal length of the primary mirror or lens



the length of the telescope tube



the diameter of the eyepiece

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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schmienceschmience
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3 months ago
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xiaily Author
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3 months ago
Thanks for your help!!
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Thanks
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This site is awesome
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