Question

ow many diopters are there for for a converging lens with a focal length of 0.4m?
−25
−04
+0.4
+2.5

Answer 1

Answer on Question #47004-Physics-Optics

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

- -2.5

- -0.4

+ -0.4

+ -2.5

Solution

A lens with a focal length of $f = +0.4 \, \text{m}$ (converging lens) has a power

$$P = \frac{1}{f} = \frac{1}{+0.4 \, \text{m}} = +2.5 \, \text{diopters}.$$

Answer: +2.5 diopters.

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