Answer to Question #52755 in Optics for Atooki Yunus

Question #52755

How many diopters are there for for a converging lens with a focal length of 0.4m?

−2.5
−0.4
+0.4
+2.5

Expert's answer

A lens with a focal length of f=+0.4 m (converging lens) has a power
P=1/f=1/(+0.4m)=+2.5 diopters.

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