A plane electromagnetic wave traveling in the positive direction of an x axis in vacuum has components `E_(x)=E_(y)=0 ` and `E_(z) = (4.0V//m) cos [(pixx10^(15)s^(-1)) (t-x//c)]` . (a) What is the amplitude of the magnetic field component ? (b) Parallel to Which axis does the magnetic field oscillate ? (c ) When the electric field component field oscillate ? (c ) When teh electric field component is in the the positive direction of the z axis at a certain point P what is the direction of the magnetic field component there ? (d) In what direction is the wave moving ?

Explanation

(a) 13 nT , (n) y , (c ) negative direction of y , (d) positive direction of x