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 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
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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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