Question

An object is kept in front of a concave mirror of focal length 15 cm. The image is three times the size of the object.Calculate two possible distance of the object from the mirror
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Answer 1

Explanation:

The image formed is real and three times the size of the object. Calculate the distance of the object from the mirror. u = ? Hence, (u) = 20 is the distance of the object from the mirror.

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Answer 2

Answer:

When an object is placed at a distance of 15 cm from a concave mirror its image is formed at 10 cm in front of the mirror. When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror.

Explanation:

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