The maximum magnetic field strength of an electromagnetic field is 5 X 10-6 T. Calculate the maximum electric field strength if the wave is traveling in a medium in which the speed of the wave is 0.73c.

Is there a picture to go along with this

It should be d if not then c

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.