Which of the following statements about electromagnetic waves in free space are true? (There could be more than one correct choice.)
A) The higher-frequency travel faster than the lower-frequency waves.
B) The higher-frequency waves have shorter wavelengths than the lower-frequency waves.
C) The wavelengths of the visible waves are some of the shortest electromagnetic waves.
D) The electric field vector is always at right angles to the magnetic field vector.
E) The wavelengths of the visible waves are some of the longest electromagnetic waves.

Question

Quizplus · Accepted Answer

B) Higher-frequency waves indeed have shorter wavelengths than lower-frequency waves, as frequency and wavelength are inversely related in the wave equation $c = \lambda f$, where $c$ is the speed of light in a vacuum, $\lambda$ is the wavelength, and $f$ is the frequency. D) In electromagnetic waves, the electric and magnetic fields are perpendicular to each other and to the direction of wave propagation, which is a fundamental property of these waves.

Which of the Following Statements About Electromagnetic Waves in Free