Jee Main
Electromagnetic Waves
JEE Main 2026 (Online) 28th January Morning Shift
MCQ+4 / -12026
The electric field of an electromagnetic wave travelling through a medium is given by $\vec{E}(x, t)=25 \sin \left(2.0 \times 10^{15} t-10^7 x\right) \hat{n}$ then the refractive index of the medium is $\_\_\_\_$ .
(All given measurement are in SI units)