Q. If an electromagnetic wave is propagation in a medium with permittivity $\varepsilon$ and permittivity $\mu$, then $\sqrt{\frac{\mu}{\varepsilon}}$ is the

A) Intrinsic impedance of the medium
B) Square of the refractive index of the medium
C) Refractive index of the medium
D) Energy density of the medium
Explanation

(a) $\sqrt{\frac{\mu}{\varepsilon}} =$ has the dimensions of resistance, hence it is called the intrinsic impedance of the medium

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.