# At what distance from a 27 mW point source of electromagnetic waves is the electric field...

## Question:

At what distance from a 27 mW point source of electromagnetic waves is the electric field amplitude 0.070 V/m?

## The Electromagnet Intensity:

Electromagnetic intensity is defined by the power that passes perpendicularly through a surface divided by the surface area under the spherically uniform radiation. It is also related to the energy density because the power is the total energy per unit time.