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Geometrical Optics question

2014 · Shift 0 · Q53

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JEE Main
Physics
Geometrical Optics
2014 · Shift 0 · Q53

Geometrical Optics question

2014 · Shift 0 · Q53

JEE MainPhysicsGeometrical OpticsMCQ+4 / −1

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 :

A
${f_1} = {f_2} \lt f$
B
${f_1} \gt f$ and ${f_2}$ becomes negative
C
${f_2} \gt f$ and ${f_1}$ becomes negative
D
${f_1}\,$ and ${f_2}\,$ both become negative

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