Power and Electric Field problem

[kranav]

Homework Statement

The peak electric field produced by the raditation at a distance of 2m is 2.5V/m. What is the power of the light source?

Homework Equations

no clue

The Attempt at a Solution

no clue

 

[Delphi51]

Take a look at this
http://electron9.phys.utk.edu/phys135d/modules/m10/emwaves.htm
down to "magnitude of the energy flux S" where it gives the energy of the electromagnetic wave per square meter per second in terms of E.

If you don't know otherwise, I would assume the source radiates in all directions so the power of the lights source is spread over an expanding sphere.

 

[kranav]

Take a look at this
http://electron9.phys.utk.edu/phys135d/modules/m10/emwaves.htm
down to "magnitude of the energy flux S" where it gives the energy of the electromagnetic wave per square meter per second in terms of E.

If you don't know otherwise, I would assume the source radiates in all directions so the power of the lights source is spread over an expanding sphere.

Hello!
Thanks a bunch, it really helped.

 

[Delphi51]

Most welcome! Wikipedia is powerfully helpful.