Doctor advised to use 2D lens. What is its focal length? – InterviewSolution

1.

Doctor advised to use 2D lens. What is its focal length?

Answer»

Given power of lens P = 2D

We know, P = 100/f(in cm) = 2

= 100/f = f = 100/2 = 50 cm

∴ Focal length of lens (f) = 50 cm.

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