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Question

# Light is made to travel from medium 1 to medium 3 through medium 2 as shown in figure. If μ1,μ2 and μ3 are the refractive indices of first, second and third media and i2>i1, then

A
sinr1=sinr2:sini1<sini2
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B
1μ2>2μ1;2μ3<3μ2
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C
1μ3<3μ1
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D
All the above
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Solution

## The correct option is D All the above(D)→ From figure, r1=r2 & i1<i2∴ sinr1=sinr2&sini1>sini2→ Medium 2 is denser compared to medium 1.∴ 1μ2>2μ1Medium 3 is rarer compared to medium 2∴ 2μ3<3μ2→ Since i1<i2 for r1=r2Medium 3 is rarer compared to medium 1∴ 1μ3<3μ1

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