Field of a Single Particle?

Most recent answer: 06/05/2010

Suppose that nothing exists in our universe except for a single electrically charged particle. How far will the electric field surrounding that particle extend? Does it have an infinite value? Will it be able to attract an equally opposite-charged particle located at 'gonzillions' miles away? Does gravity act likely?
- A single proton (age 1.3x10^10)
Dear Methuselah,
The electric field of a single charged particle is just that described in an elementary text, as well as its force on another charged particle.   See: 
As far as we know, gravitational and electric fields don't interact,  beyond the simple small interaction due to the energy density in the electric field. 


(published on 06/05/2010)