Properties of EM Waves — MCQ Practice

An electromagnetic wave is propagating in a medium with relative permittivity $K_e = 9$ and relative permeability $K_m = 1$. If the speed of light in vacuum is $c = 3 \times 10^8\,\text{m/s}$, what is the speed of the electromagnetic wave in this medium?

Which of the following statements about electromagnetic waves is INCORRECT?

The peak electric field in an electromagnetic wave is $E_0 = 120\,\text{V/m}$. What is the peak magnetic field $B_0$ associated with this wave in a vacuum? (Given: $c = 3 \times 10^8\,\text{m/s}$)

An electromagnetic wave has a frequency of $6 \times 10^{14}\,\text{Hz}$. What is its wavelength in a vacuum? (Given: $c = 3 \times 10^8\,\text{m/s}$)

A perfectly absorbing surface receives an electromagnetic wave with an intensity of $100\,\text{W/m}^2$. What is the radiation pressure exerted on the surface? (Given: $c = 3 \times 10^8\,\text{m/s}$)

Which of the following properties is common to both X-rays and radio waves?

An EM wave is propagating in the positive x-direction. If the electric field oscillates along the y-axis, in which direction does the magnetic field oscillate?