Answer: Positive x direction.
- A Positive x direction
- B Negative x direction
- C y direction
- D z direction
Correct answer: A. Positive x direction
Explanation: E = E<sub>0</sub> sin(kx - ωt): the wave travels in the positive x direction (kx and ωt terms: positive k coefficient, negative ωt coefficient means positive x travel).
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.