In an experiment to measure the focal le...

In an experiment to measure the focal length of a concave mirror. If was found that for an object distance of 0.30 m, the image distance come out to be 0.60 m. Let us determine the focal length.

A

` (0.2 ± 0.01) m`

B

`(0.1 +- 0.01)m`

C

`(0.2 +- 0.02)m`

D

`(0.1 +- 0.02)m`

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