Question

8.
Determine the focal length of a diverging lens that produces an image that is 12.9 cm from the lens
(and on the object's side) when the object is 32.4 cm from the lens.

Answer 1

Answer:

=-21.43

Explanation:

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Answer 2

We have that the focal length is

$f=19.058$

From the Question we are told that

image distance $v=12.9$

object distance $u=32.4$

Generally the equation for focal length   is mathematically given as

$\frac{1}{f}=\frac{1}{v}-\frac{1}{u}\\\\\frac{1}{f}=\frac{1}{12}-\frac{1}{32.4}$

$f=19.058$

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