Being ejected from ψ of the non-transit particle means the transit particle is freed. Beyond ψ, where x>xa, the transit particle and the non-transit particle, being of the same type, repel each other. An the ejected particle quickly gain light speed, c.
Wait a minute! The same type?!
Yes, as in an electron cloud! Physically in space, a cloud, as the sum of individual particles' ψ. In energy, ψn or En in shells or energy levels.
Have a nice day.
