Question
Can an electromagnetic wave be deflected by an electric field or a magnetic field?

Answer

No, an electromagnetic wave cannot be deflected by an electric field or a magnetic field. This is because according to Maxwell's theory, an electromagnetic wave does not interact with the static electric field and magnetic field. Even if we consider the particle nature of the wave, the photon is electrically neutral. So, it is not affected by the static magnetic and electric fields.

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  1. A point charge q moving with speed v enters a uniform magnetic field B that is acting into the plane of the paper as shown. What is the path followed by the charge q and in which plane does it move?
  2. How does the path followed by the charge get affected if its velocity has a component parallel to $\overrightarrow{\text{B}}$?
  3. If an electric field $\overrightarrow{\text{E}}$ is also applied such that the particle continues moving along the original straight line path, what should be the magnitude and direction of the electric field $\overrightarrow{\text{E}}$?