3 ms·
The charge is in essence a measure of how strongly the particle couples to the field. If the charges are opposite then the coupling gets reversed and so the exc
by antognini 3y ago
The charge is in essence a measure of how strongly the particle couples to the field. If the charges are opposite then the coupling gets reversed and so the excitation reduces the energy.
Likewise if a particle somehow had a negative mass, it would gravitationally repel particles of positive mass.