Question

To find the focal length of a concave mirror, Sita should choose which one of the

following :


(a) A mirror holder and screen holder

(b) A screen holder and a scale

(c) A mirror holder, a screen holder and a scale

(d) A screen, a mirror, holders for them and a scale​

Answer 1

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(d) A screen, a mirror, holder for them and a scale.

 To find the focal length of a concave mirror, Sita should choose a screen, a mirror, holder for them and a scale, where the screen is used to collect the real image, and a scale to measure the focal length.

Answer 2

Answer:

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Explanation:

In order to find focal length option D is correct as she needs a mirror for forming image , screen to obtain image ,holders to hold and scale to find distance between screen and object