Question

A lens which has focal length of 4 cm and refractive
index of 1.4 is immersed in a liquid of refractive
index 1.6, then the focal length will be
(a) - 12.8 cm
(b) 32 cm
. (e) 12.8 cm
(d) -32 cm​

Answer 1

Answer:

-12.8cm

Explanation:

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