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doit_the_clown doit_the_clown
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7 years ago
Spherical aberration in the primary mirror of a reflecting telescope is GENERALLY avoided by

(a)   making the mirror surface a parabolic shape.
(b)   using adaptive optics.
(c)   putting extra lenses in the light beam to correct for the shape of the primary mirror.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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I appreciate what you did here, answered it right Smiling Face with Open Mouth
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Just got PERFECT on my quiz
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