A concave mirror and a converging lens (glass with mu = 1.5) both have a focal length of 3 cm when in air. When they are in water (mu=4/3), their new focal length are

A concave mirror and a converging lens (glass with mu = 1.5) both have

1.	A concave mirror and a converging lens (glass with mu = 1.5) both have a focal length of 3 cm when in air. When they are in water (mu=4/3), their new focal length are
Answer» `f_("LENS") = 12 cm , f_("MIRROR") = 3 cm` `f_("Lens") = 3 cm , f_("Mirror") = 12 cm` `f_("Lens") = 3 cm , f_("Mirror") = 3 cm` `f_("Lens") = 12 cm , f_("Mirror") = 12 cm` ANSWER :a

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A concave mirror and a converging lens (glass with mu = 1.5) both have a focal length of 3 cm when in air. When they are in water (mu=4/3), their new focal length are

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