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A concave mirror when placed in air has a focal length f=20 ~cm . The mirror is now placed horizontally and filled with a thin layer of water having refractive index 4 3 . The object is placed horizontally near the principal axis at a distance d from the mirror such that a real, inverted image is formed at the same plane as the object, as shown in the figure. What is the value of d ?

Options

  1. A30 cm
  2. B20 cm
  3. C15 cm
  4. D40 cm

Correct answer

A. 30 cm

Step-by-step solution

No Solution

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