if magnetic field of an electromagnetic wave is given how we will find electric field and poynting.......

Question

kira_yamato · Answer

The E-field will be perpendicular to the B-field itself... So with the E-field given, you can find the B-field, which will be perpendicular to the E-field and the direction of propagation. The diagram attached summarizes this whole information, so you may like to take a look at it. The red arrows represent the E-field while the blue arrows represent the B-field.

anonymous · Answer

Also a quick easy way is to remember that the e field follows the Right hand rule and a magnetic field follows the Left hand rule. Quick easy references will help avoid mistakes. It has to do with the way a cross product works out and how the E field and B field are Related and Dependent on each other. Lucky for us the math isn't backwards because then all the coordinates would be backwards. Look up Wronskian It's a generalized method to solve for values of systems of equations that depend to a greater or lesser degree on one another.

anonymous · Answer

To find the Electric field, recognize that the relative phase will be the same, the amplitude E = cB, and it is perpendicular to the Magnetic Field.  The Poynting Vector is just E cross B divided by mu zero.