MCQEasyJEE Main 2026 · 28 January, Shift 1Characteristics of EM Waves

Physics Question from JEE Main 2026 · 28 January, Shift 1

The electric field of an electromagnetic wave travelling through a medium is given by E(x,t)=25sin(2×1015t107x)n^.\vec{E}(x,t)=25\sin(2\times10^{15}t-10^{7}x)\,\hat{n}. Then the refractive index of the medium is _____. (All given measurements are in SI units)

  • A

    1.71.7

  • B

    1.51.5

  • C

    1.21.2

  • D

    22

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