A thin convex lens made from crown glass (mu = 3/2) has focal length f. When it is measured in two different liquids having refractive indices 4/3 and 5/3 it has the focal length f1 and f2 respectively. The correct relation between the focal length is - VgyanHub

Question:

A thin convex lens made from crown glass (mu = 3/2) has focal length f. When it is measured in two different liquids having refractive indices 4/3 and 5/3 it has the focal length f₁ and f₂ respectively. The correct relation between the focal length is

Options :

(a) f1=f2
(b) f1 > f and f2 becomes negative
(c) f2 > f and f1 becomes negative
(d) f1 and f2 both becomes negative

Answer :

(b) f₁>f and f₂ becomes negative

Answer Steps :

step 1

step 2

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