A Department Store Sells an "Astronomical Telescope" with an Objective

question 251

Multiple Choice

A department store sells an "astronomical telescope" with an objective lens of 30-cm focal length and a diameter of 5 cm, and an eyepiece lens of focal length 5 mm and diameter 4 mm. What is the magnifying power of this telescope?

• A) 6×
• B) 150×
• C) 60×
• D) 12.5×

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