In the figure. shown- a slab of refracti...

In the figure. shown- a slab of refractive index `(3)/(2)` is movedat speed 1m/s towards a stationary observer. A point 'P' is observed by the observer with the help of paraxial rays through the slab. Both 'O' and observer lie in air. The velocity with which the image will moveis:

2 m/s towards left

`(4)/(3)` m/s towards left

3 m/s towards left

Zero

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