Question

Which of the following statements are incorrect regarding properties of EM waves?

• A. Electric and magnetic field components oscillate perpendicular to each other and to the direction of propagation of the wave.
• B. EM waves cannot travel in vacuum and require a medium
• C. When an electrically charged particle moves under acceleration, electric and magnetic fields are produced
• D. None of these

Answer 1

The correct option is B EM waves cannot travel in vacuum and require a medium

When electrically charged particles are accelerated, alternating electric and magnetic fields are produced and transmitted. These fields are transmitted in form of waves called as electromagnetic waves (EM waves).
The electric and the magnetic fields oscillate perpendicular to each other and also to the direction of propagation of the wave. These waves do not require any medium and can travel in vacuum.