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Define focal length of a mirror and henc...

Define focal length of a mirror and hence relate focal length and radius of curvature of a mirror.

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(a) The distance between the pole and the principal focus of the mirror is called focal length (f).
(b) `f=(R)/(2)` where R - radius of curvature of a spherical mirror.
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SUBHASH PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-TWO MARKS QUESTIONS WITH ANSWERS
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