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Question

The x-y plane is the boundary between two transparent media. Medium-1 with z > 0 has index refractive 2 and medium - 2 with z < 0 has a refractive index 3. A ray of light in medium - 1 given by the vector A=63^i+83^j10^k is incident on the plane of separation.Find the unit vector in the direction of refracted ray in medium -2.

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Solution

μ1sinθ1=μ2sinθ2
cosθ110(63)2+(83)2+100=10400=1020
cosθ1=12
θ1=60o
μ1sinθ1=μ2sinθ2
2sin60=3sinθ2
232=3sinθ2
2×32=3sinθ2
sinθ2=12
θ2=45o










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