- #1

TerryW

Gold Member

- 165

- 6

What is a 'generic' field? My expectation is that it would comprise an Electric Field, with arbitrary direction, a Magnetic Field, also with arbitrary direction, and a radiation field (E and B of equal magnitude) , radiating in an arbitrary direction.

Trying to put this together however to get the Poynting density of energy flow and the density of energy is a bit of a mess however, so I suspect my expectation is wrong.

Moving on to the next bit of the problem, if you do define the unit vector

**and velocity parameter α as shown, then a solution to this is a radiation field with E along the x axis, B along the y axis, producing a Poynting vector along the z axis. If you then translate to the rocket frame,**

*n***E**X

**B**disappears because

**B**becomes zero, not because

**B**becomes parallel to

**E**. I can't see how

**B**ends up parallel to

**E**.

Can anyone help?

TerryW