The image of an object place at a distance of 38 cm on the principal axis of a concave mirror from its pole., is formed on the object itself, then its focal length will be _____
19 cm
15 cm
10 cm
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(a) The image formed in a plane mirror is virtual because it is formed inspite of there not being an actual meeting of the light rays.
(b) The image formed on a cinema screen is real because it is formed due to an actual meeting of the light rays
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