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Christie Bought a 9 × 50 Pair of Binoculars for Stellar

Question 17

Multiple Choice

Christie bought a 9 × 50 pair of binoculars for stellar observing. The 9 is the

A) (f/number) ^-1
B) aperture in mm.
C) f/number.
D) aperture in cm.
E) angular magnification.

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