Time taken by light to travel in two different materials A and B of refractive indices μ A and μ B of same thickness is t₁ and t₂ respectively. If t₂-t₁=5 × 10⁻¹⁰ s and the ratio of μ A to μ B is 1: 2. Then, the thickness of material, in meter is: (Given v A and v B are velocities of light in A and B materials respectively.)

Optics: JEE Main 2022 Physics question

JEE Main 2022 · 25 Jul, Morning shift · Q7115

JEE Main 202225 Jul, Morning shiftPhysicsMediumOptics190× since 2002

Time taken by light to travel in two different materials

A

and

B

of refractive indices

\mu_{A}

and

\mu_{B}

of same thickness is

t_{1}

and

t_{2}

respectively. If

t_{2}-t_{1}=5 \times 10^{-10}

s and the ratio of

\mu_{A}

\mu_{B}

1: 2

. Then, the thickness of material, in meter is: (Given

v_{\mathrm{A}}

and

v_{\mathrm{B}}

are velocities of light in

A

and

B

materials respectively.)

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