Question

In a concave mirror experiment,an object is placed at a distance x1 from the focus and the image is formed at a distance x2 from the focus. The focal length of the mirror would be ?

Answer 1

Answer:

The answer is

Explanation:

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1/v-1/u=1/f

1/x2-1/x1=1/f

x1-x2/x1x2=1/f

x1x2/x1-x2m=f

(On substituting the values (if given) we get the value of f)

Answer 2

Answer = √x1 x2

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