Ncert Exercises & Solutions

A linearly polarised electromagnetic wave given as $E = E_{0} \hat{i} \cos (kz - ωt)$ is incident normally on a perfectly reflecting infinite wall at z = a. Assuming that the material of the wall is optically inactive, the reflected wave will be given as:

1. $E_{r} =- E_{0} \hat{i} \cos (kz - ωt)$

2. $E_{r} = E_{0} \hat{i} \cos (kz + ωt)$