An electromagnetic wave going through vacuum is described by E=E0sinkx-𝜔t. Which of the following is independent of the wavelength?

Question

An electromagnetic wave going through vacuum is described by

E = E_{0} \sin (k x - 𝜔 t)

. Which of the following is independent of the wavelength?

k

ω

\frac{k}{ω}

k ω

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