Questions
A magnifying glass is to be used at the fixed object distance of 1 inch. If it is to produce an erect image magnified 5 times its focal length should be
detailed solution
Correct option is C
m=vu=5⇒v=5 inch ( Given u=1 inch ) Using sign convention u=−1 inch ,v=−5 inch ∴1f=1v−1u=1−5−1−1⇒f=1.25 inchTalk to our academic expert!
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The sun's diameter is and its distance from the earth is . The diameter of its image, formed by a convex lens of focal length 2m will be
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