A concave mirror ia placed over a beaker containing water of (µ = 1.33) and image of the object placed at the bottom of beaker is formed at a distance of 25 cm from the top, then focal length of the mirror is

Options

(a) 10 cm
(b) 15 cm
(c) 20 cm
(d) 25 cm

Correct Answer:

20 cm

Explanation:

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