In vacuum, the components of an $\mathrm{EM}$ wave are $\mathrm{E}_{\mathrm{y}}=(50 \mathrm{~V} / \mathrm{m}) \cos \left[\left(5.00 \mathrm{~m}^{-1}\right) \mathrm{x}+\omega \mathrm{t}\right], \mathrm{E}_{\mathrm{x}}=0$, and $\mathrm{E}_{\mathrm{Z}}=0$. What is the wavelength of the wave?
A) $1.26 \mathrm{~m}$
B) $2.52 \mathrm{~m}$
C) $5.00 \mathrm{~m}$
D) $0.200 \mathrm{~m}$
E) $0.796 \mathrm{~m}$

Question

Quizplus · Accepted Answer

The wavelength $\lambda$ can be found from the wave number $k$, where $k = 2\pi / \lambda$. Given $k = 5.00 \, \mathrm{m}^{-1}$, solving for $\lambda$ gives $\lambda = 2\pi / 5.00 = 1.26 \, \mathrm{m}$.

In Vacuum, the Components of An EM\mathrm{EM}EM Wave Are , And EZ=0\mathrm{E}_{\mathrm{Z}}=0EZ​=0

In Vacuum, the Components of An $\mathrm{EM}$ Wave Are , And $\mathrm{E}_{\mathrm{Z}}=0$