The problem involves determining the power of a light source based on the peak electric field produced by radiation at a specific distance. The subject area relates to electromagnetism and the properties of electromagnetic waves.
Some participants have provided links to external resources that may clarify the relationship between electric field strength and energy flux. There is an acknowledgment of the need to explore the implications of the radiation pattern on the power calculation.
The original poster expresses uncertainty about the relevant equations and concepts, indicating a lack of initial understanding of the problem setup.
Delphi51 said: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.