Electromagnetic Waves — Prelims Questions

Which of the following statements about electromagnetic waves is INCORRECT?

An electromagnetic wave has an electric field component given by $E_y = 100 sin(2pi \times 10^8 t - kx),\text{V/m}$. What is the peak value of the magnetic field component?

Which of the following parts of the electromagnetic spectrum has the highest frequency?

A plane electromagnetic wave is propagating in the positive x-direction. If the electric field oscillates in the y-direction, in which direction does the magnetic field oscillate?

The average intensity of an electromagnetic wave is $10,\text{W/m}^2$. What is the peak electric field strength ($E_0$) of this wave? (Given $mu_0 = 4pi \times 10^{-7},\text{T}cdot\text{m/A}$, $c = 3 \times 10^8,\text{m/s}$)

Which of the following phenomena is NOT explained by the wave nature of electromagnetic radiation?