A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by

Q. A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by

A.            15

B.            20

C.            30

D.            0

Answer: 0
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