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A point object is placed 20 cm left of a...

A point object is placed 20 cm left of a convex lens of focal length f = 5 cm (see the figure). The lens is made to oscillate with small amplitude A along the horizontal axis. The image of the object will also oscillate along the axis with

A

amplitude A/9, out of phase with the oscillation of the lens.

B

amplitude A/3, out of phase with the oscillations of the lens.

C

amplitude A/3, in phase with the oscillations of the lens

D

amplitude A/9, in phase with the oscillations of the lens

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The correct Answer is:
A
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