Which relation between angular frequency and wave number must hold for a plane…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

Which relation between angular frequency

ω

and wave number

k

must hold for a plane electromagnetic wave propagating in vacuum? (a)

\omega/k = \dfrac{2\pi}{\sqrt{\mu_0\,\varepsilon_0}}

(b)

\omega/k = \dfrac{1}{2\sqrt{\mu_0\,\varepsilon_0}}

(c)

\omega/k = \dfrac{1}{\sqrt{\mu_0\,\varepsilon_0}}

(d)

\omega/k = \dfrac{1}{\sqrt{2\,\mu_0\,\varepsilon_0}}