A plane electromagnetic wave enters a lossless non-magnetic dielectric of refractive index n. The ratio E₀/B₀ inside the medium is:
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Question

A plane electromagnetic wave enters a lossless non-magnetic dielectric of refractive index n. The ratio E₀/B₀ inside the medium is:

G1 Physics · Accepted Answer

Wave speed in a non-magnetic dielectric is v = c/n. For a plane electromagnetic wave in any linear medium, E₀/B₀ = v. Therefore, E₀/B₀ = c/n. Correct option: B.