1.

A concave mirror of focal length f (in air) is immersed in water (\[\mu =4/3\]). The focal length of the mirror in water will be                                                                                                [MNR 1998]

A. \[f\]
B. \[\frac{4}{3}\]\[f\]
C. \[\frac{3}{4}f\]
D. \[\frac{7}{3}\]\[f\]
Answer» B. \[\frac{4}{3}\]\[f\]


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