A linearly polarized electromagnetic wave in vacuum is E = 3.1 cos[(1.8)z - (5.4 x 10^6)t] i N/C

Question

A linearly polarized electromagnetic wave in vacuum is

E = 3.1 cos[(1.8)z - (5.4 x 10⁶)t] \(\hat{i}\,N/C\)

is incident normally on a perfectly reflecting wall at z = a. Choose the correct option

(1) The wavelength is 5.4 m

(2) The frequency of electromagnetic wave is 54 x 10⁴ Hz.

(3) The transmitted wave will be  E = 3.1 cos[(1.8)z - (5.4 x 10⁶)t] \(\hat{i}\,N/C\)

(4) The reflected wave will be  E = 3.1 cos[(1.8)z - (5.4 x 10⁶)t] \(\hat{i}\,N/C\)

Answer 1

Correct answer is 4

Reflected wave will have direction opposite to incident wave.