A particle executes SHM of amplitude 1 cm along the principal axis of a convex lens of focal length 12 cm. The mean position of oscillation is at 20 cm from the lens. Find the amplitude of oscillation of the image of the particle.

2 cm

1 cm

2.6 cm

2.3 cm

A

2.3 cm

B

2.6 cm

C

2 cm

D

1 cm

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Solution

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1v−1u=1f

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