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Question

An object is placed at a distance of 25 cm froma concave mirror of focal length 20 cm. Find the distance and nature of the image

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Solution

Given,
Object distance, u=25cm

Focal length, f=20cm

From mirror formula

1f=1v+1u

120=1v125

1v=120+125

v=100cm

The image will be real, inverted magnified

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