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staedtler staedtler
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7 years ago
At what distance from the objective lens in a refracting telescope is the primary image formed (i.e., at what distance would you place photographic film if you wanted to take a photograph)?
A)   Its focal length
B)   Its diameter
C)   Twice its focal length
D)   Immediately behind the lens to collect the most light
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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hyponoticahyponotica
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7 years ago
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staedtler Author
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7 years ago
I really appreciate your help!
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