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staedtler staedtler
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7 years ago
A refracting telescope is the type that uses, as its main optical element,
A)   a lens.
B)   a prism of glass.
C)   a combination of many small plane mirrors.
D)   a mirror.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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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
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