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What is the relation between focal lengt...

What is the relation between focal length of a spherical mirror and its radius of curvature ?

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r = 2f where r is the radius of curvature and f is the focal length of the spherical mirror.
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  16. A concave mirror is dipped in vessel containing kerosene. Will this af...

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  17. What is the kind of mirror used by an ENT specialist to examine the ea...

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