Poynting vector

1. Mar 11, 2009

jc09

If the electromagnetic wave is descirbed as:
E=Eocosw((eu)^1/2z-t)i + Eosinw((eu)^1/2z-t)j
Find the corresponding magnetic field and the poynting vector.

2. Mar 11, 2009

tiny-tim

Hi jc09!

Show us what you've tried, and where you're stuck, and then we'll know how to help!

3. Mar 11, 2009

jc09

Well I know VxE= -dB/dt so if i get the curl of E given I will get minus the value of the differentiate form. So will I then integrate back up or is this right?

4. Mar 11, 2009

tiny-tim

have a del: ∇

s'right!

go for it!

5. Mar 11, 2009

jc09

So I got B=(eu)^1/2Eocosw((eu)^1/2z-t) is that right.
To get the poynting vector I need to use S=E x H. What is H?

6. Mar 11, 2009

tiny-tim

Last edited by a moderator: Apr 24, 2017
7. Mar 11, 2009

jc09

ok I got it now thanks