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Question
When a convex lens of 12.5 cm focal length is used as a magnifying glass, normal eye can see an object clearly at a distance of 25 cm. The magnifying power of the instrument is ____________.
Options
10
6
2
3
MCQ
Fill in the Blanks
Solution
When a convex lens of 12.5 cm focal length is used as a magnifying glass, normal eye can see an object clearly at a distance of 25 cm. The magnifying power of the instrument is 3.
Explanation:
M.P = `(D/F + 1)`
= `(25/12.5 + 1)` = (2 + 1) = 3
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