- #1

MeatComet

- 3

- 4

- Homework Statement
- A wireless telephone is emitting a constant 10,0mW effect in a homogenous area around the telephone. What is the amplitude of the electrical field 4,0cm from the headset?

- Relevant Equations
- I=P/A,

I=P/(4*pi*r^2),

I=P/(pi*r^2),

I=(1/2)*√(ε0/μ0)*(E0^2)

My question is specifically with calculating the intensity. The book solution is

I=P/(4*pi*r^2)

but would this not give me a weaker electrical amplitude in the final calculation after plugging it in to

I=(1/2)*√(ε

I=P/(4*pi*r^2)

but would this not give me a weaker electrical amplitude in the final calculation after plugging it in to

I=(1/2)*√(ε

_{0}/μ_{0})*(E_{0}^{2}) ?