Revanth noticed while holding a concave mirror in sunlight that a small and brightest spot is forming
on the paper which is placed at a distance 30 cm from it
i) What is the focal length of the mirror ?
ii) Find distance from the given concave mirror, small bulb should be placed to get a parallel beam
of rays?
iii) What will be the magnification of image formed when an object is placed at a distance 10 cm in front of it
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