The electric field of an electromagnetic wave travelling through vacuum is given by the equation $E = E_0 sin (kx - ωt)$. The quantity that is equal to wavelength is

$\frac{k}{ω}$ $kω$ ω k

$\frac{k}{ω}$

$E=E_0 sin(kx - ωt)$ Comparing with standard equation we will get Wavelength $=\frac{k}{ω}$