A thin convex lens made from crown glass (μ = 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 lengths f₁ and f₂ respectively. The correct relation between the focal lengths is:

(B) f₁ > f and f₂ becomes negative

(C) f₂ > f and f₁ becomes negative

(D) f₁ and f₂ both become negative

Optics: JEE Main 2014 Physics question

JEE Main 2014 · Session, Shift 1 · Q7030

JEE Main 2014Session, Shift 1PhysicsMediumOptics190× since 2002

A thin convex lens made from crown glass

\left( {\mu = {3 \over 2}} \right)

has focal length

f

. When it is measured in two different liquids having refractive indices

{4 \over 3}

and

{5 \over 3},

it has the focal lengths

{f_1}

and

{f_2}

respectively. The correct relation between the focal lengths is :

JEE Main 2014 Optics Question with Solution (Session Shift 1, Q7030) | JEE Arc