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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
Why are most large telescopes reflectors, not refractors?
A) Large lenses deform under their own weight, but mirrors can be supported.
B) Reflectors do not suffer from chromatic aberration like refractors do.
C) Large mirrors need only one optical surface, achromats four surfaces to grind.
D) Large, very clear lenses are harder to cast than more tolerant mirror blanks.
E) All of the above are correct.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
You answered my question so timely, I really value that, thank you
Minoring in physics
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8 years ago
Happy to help Slight Smile
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