1.

The image of an object placed in front of a concave mirror of focal length 15 cm is of the same size as the object. The distance between the object and its image is :(a) 15 cm(b) 30 cm(c) 60 cm(d) Zero

Answer»

Correct answer is (d) Zero

At c, object produces same sized image.

∵ f = 15 cm,

∴ R = 30 cm

object and image both are at c. therefore, distance between them is zero.



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