Answer: Perpendicular to each other and to the direction of propagation.
- A Perpendicular to each other and to the direction of propagation
- B Parallel to each other in general practice as frequently described
- C Parallel to the direction of propagation in most textbook accounts
- D E is parallel while B is perpendicular to propagation during normal conditions
Correct answer: A. Perpendicular to each other and to the direction of propagation
Explanation: EM waves are transverse. E, B, and the propagation direction are all mutually perpendicular. If E is along x-axis and B along y-axis, propagation is along z-axis.
In an electromagnetic wave, the oscillating electric field (E) and magnetic field (B) are perpendicular to each other and to the direction the wave travels - a purely transverse wave that needs no medium, unlike sound.
Concept context
Maxwell's equations, EM spectrum, properties, and applications of each band.