Electromagnetic Wave Refractive Index (Jee Mains)

Wave motion

Medium

Electromagnetic Wave Refractive Index

The electric field of an electromagnetic wave travelling through a medium is given by
$\vec E(x,t) = 25\sin (2.0 \times {10^{15}}t - {10^7}x)\hat n$
then the refractive index of the medium is _____ . (All given measurement are in SI units)

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