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A telescope’s objective lens has a focal length of 50 cm, giving a total magnifi

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1. A telescope’s objective lens has a focal length of 50 cm, giving a total magnification of 25. What is the eyepiece’s focal length?

12.5 cm

5 cm

2 cm

10 cm

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A telescope’s magnification equals the objective’s focal length divided by the eyepiece’s: 50 ÷ 25 = 2 cm.

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