In both cases the final energy of the particles depends on the cumulative effect of the fields, so that many small "pushes" add together to give the combined effect of one big "push."
Kuzo zombili lezi zimo, amandla sokugcina izinhlayiya incike ensimini ingqikithi esenzweni, ukuze "uhlevane" amaningi amancane kunezelwa ndawonye ukunikeza umphumela elihlangene elikhulu elilodwa.