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A point object is kept just beyond the first focus of a convex lens. If the lens starts moving towards the right with a constant velocity, the image will

Options

  1. Aalways move towards right
  2. Balways move towards left
  3. Cfirst move towards right and then towards left
  4. Dfirst move towards left and then towards right

Correct answer

D. first move towards left and then towards right

Step-by-step solution

dv dt = v u 2 × du dt V image/lens = v u 2 × V object/lens till u become 2 f , m   >   - 1 so V image lens >   V object lens and the image will move towards left and when u become >   2 f , V image / lens   <   V object / lens and the image will move towards the right.

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