Distance between F1 and F2 is 20 cm. Find the power of the convex lens – InterviewSolution

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1.	Distance between F1 and F2 is 20 cm. Find the power of the convex lens ?
Answer» What is the POWER of lens of focal LENGTH 20cm? so, 20 CM in metres= 20/100m=1/5 metres. power of a lens= 1/1/1/5=5 DIOPTRES........ therefore, P = 1/f meters

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