A magnetic field is given by in vacuum

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

Problem

A magnetic field is given by

B(x,t)=B_0 \cos (kx+\omega t)

in vacuum. (i) Verify that this expression represents a wave moving along the –x direction. (ii) Write the relation between

B_0

and the amplitude

E_0

of the associated electric field.