What is the expression for the wave number of a sinusoidal wave whose wavelength is ?

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

Problem

What is the expression for the wave number

k

of a sinusoidal wave whose wavelength is

\lambda

? (a)

\dfrac{1}{\lambda}

(b)

\dfrac{\pi}{\lambda}

(c)

\dfrac{2\pi}{\lambda}

(d)

\dfrac{4\pi}{\lambda}