Question

Wavelength λ and wave vector k are related by ______.

Options

• k = `(2pi)/lambda`

• k = `(4pi)/lambda`

• k = `(pi)/lambda`

• k = `(pi)/(2lambda)`

Answer 1

Wavelength λ and wave vector k are related by `underline("k" = (2pi)/lambda)`.

Explanation:

The wave's spatial angular frequency, k, describes how many oscillations it completes per unit of space and is related to the wavelength by the equation `"k" = (2pi)/lambda`.