An observer with normal eyes views an object with a magnifying glass of focal length 5 cm. the angular magnification is? [least distance of distinct vision D = 25 cm]

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A. -6
B. -5
C. 5
D. 6

Correct Answer:

Option A = -6

Explanation

Angular magnification, M = ((D)/F + 1) where D is least distance of distinct vision
∴ M = ((25)/5 + 1) = -6

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