The Electric Field of an Electro-Magnetic Wave Is Given by E_y

Multiple Choice

The electric field of an electro-magnetic wave is given by E_y = 25 sin(2.4 $\times$ 10⁶ $\pi$ (x - 3.0 $\times$ 10⁸t) ) .What is the wavelength of the wave?

A) 4.8 $\times$ 10⁷ m
B) 2.1 $\times$ 10^-8 m
C) 2.1 $\times$ 10^-7 m
D) 8.3 $\times$ 10^-7 m
E) 7.5 $\times$ 10^-6 m