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Question

A object is placed 90 cm away from concave mirror of focal length 30cm .find position and Nature of image

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Solution

u = -90 cm

f = 30 cm

Mirror formula 1f = 1u + 1v

1v = 1f1u

1v = 130 + 190

v = 22.5 cm

Image is formed at a distance of 22.5 cm from the pole behind the mirror.


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