Questions
An object placed 10 cm in front of a lens has an image 20 cm behind the lens. What is the power of the lens (in dioptres)?
detailed solution
Correct option is D
u=−10cm, v=20cm 1f=1v−1u=120−−110=320⇒f=203cm Now P=100f=10020/3=+15DTalk to our academic expert!
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