A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about

0.4 cm away from the mirror

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0.4 cm towards the mirror

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0.8 cm towards the mirror

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0.8 cm away from the mirror

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Solution

The correct option is A
0.4 cm away from the mirror

As the object is moved towards the mirror, the image moves away from the mirror.

Initially v= 20, u =10

Using the mirror formula

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