Question

A linearly polarized electromagnetic wave in vacuum is $E=3.1\cos \left(1.8\right)z-\left(5.4\times 10^6\right)$ incident normally on a perfectly reflecting wall at $z=a$. Choose the correct option

• A. The wavelength is $5.4m$
• B. The frequency of electromagnetic wave is $54\times 10^{4}Hz$
• C. The transmitted wave will be $3.1\cos \left[(1.8)z-\left(5.4\times 10^6\right)t\right]\hat{i}N/C$
• D. The reflected wave will be $3.1\cos \left[(1.8)z+\left(5.4\times 10^6\right)t\right]\hat{i}N/C$

Answer 1

Answer: (D)

Reflected wave will have direction opposite to incident wave.