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The magnetic field of an electro magnetic wave in a substance is given by $B = 2 \times 10^{- 6} \cos [π (0.04 x + 10^{7} t)] T$ its refractive index

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detailed solution

Correct option is C

velocity of the wave is v=ωk=1070.04=1094 refractive index μ= cv=3×108×4109 =1.2

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The magnetic field of an electro magnetic wave in a substance is given by B=2×10-6cosπ0.04x+107t T its refractive index

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The magnetic field of an electro magnetic wave in a substance is given by $B = 2 \times 10^{- 6} \cos [π (0.04 x + 10^{7} t)] T$ its refractive index