Question

Ravi secured a concave mirror. He wanted to find it's focal length more accurately. Suggest a method to find it's focal length accurately​

Answer 1

ANSWER

The focal length is the distance from the mirror that parallel light

rays falling on it will all be reflected and converge at the same point.

For a small mirror, that is a small section of a sphere, parallel rays

incident on it will all converge to nearly the same point (focal point).

Measure the focal distance, the distance from the mirror to the

focal point, and that is half the radius of curvature.

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Answer 2

Answer:

he can do it by parallel error method

Explanation:

mirror formula is 1/f=1/v+1/u

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