Poynting Vector Simple Problem- need help ASAP!


by waiting
Tags: asap, poynting, simple, vector
waiting
waiting is offline
#1
Jul25-08, 09:34 PM
P: 3
Here's the question:

An electromagnetic wave is traveling through vacuum. Its electric field vector is given by

E= E_0 sin(kx-wt)y_hat

where "y hat" is the unit vector in the y direction.

What is the Poynting vector S(x,t), that is, the power per unit area associated with the electromagnetic wave described in the problem introduction?

Please express in terms of all or some of the folowing variables: E_0, B_0, k,x,w,t, mu_0 and the unit vectors x_hat, y_hat and z_hat.

I've already tried (E_0 * B_0)/ mu_0....it didnt work, i think they want the answer in more depth!

Any help is appreciated!!
Phys.Org News Partner Science news on Phys.org
SensaBubble: It's a bubble, but not as we know it (w/ video)
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Microbes provide insights into evolution of human language
Hootenanny
Hootenanny is offline
#2
Jul27-08, 05:35 AM
Emeritus
Sci Advisor
PF Gold
Hootenanny's Avatar
P: 9,789
Quote Quote by waiting View Post
Here's the question:

An electromagnetic wave is traveling through vacuum. Its electric field vector is given by

E= E_0 sin(kx-wt)y_hat

where "y hat" is the unit vector in the y direction.

What is the Poynting vector S(x,t), that is, the power per unit area associated with the electromagnetic wave described in the problem introduction?

Please express in terms of all or some of the folowing variables: E_0, B_0, k,x,w,t, mu_0 and the unit vectors x_hat, y_hat and z_hat.

I've already tried (E_0 * B_0)/ mu_0....it didnt work, i think they want the answer in more depth!

Any help is appreciated!!
Start by determining the corresponding magnetic field.


Register to reply

Related Discussions
Poynting vector Classical Physics 2
Waves: Poynting vector Advanced Physics Homework 1
Poynting Vector question Classical Physics 2
poynting vector General Physics 3
Poynting vector Introductory Physics Homework 5