hat
Gen fil altène ap koule kounye a, radyasyon elektwomayetik la ka rive, kapasite a nan radyasyon ak longè ak fòm nan fil la. Yo montre nan Figi yon, si fil yo de ki pi pre, se jaden an elektrik ant fil yo mare l 'nan de, se konsa radyasyon an se trè fèb; louvri de fil yo, jan yo montre nan B, C, jaden an elektrik sou la gaye nan nan ki antoure espas, Radyasyon. Yo dwe te note ke, lè L a longè fil la se pi piti anpil pase λ nan longèdonn, radyasyon an ki fèb; fil L longè yo dwe konpare ak longèdonn a, fil a pral ogmante anpil aktyèl la, epi konsa ka fòme yon radyasyon fò.
eng
There wire alternating current flows, the electromagnetic radiation can occur, the ability of radiation and the length and shape of the wire. Shown in Figure a, if the two wires in close proximity, the electric field between the wires is bound in two, so radiation is very weak; open the two wires, as shown in b, c, the electric field on the spread in the surrounding space, Radiation. Must be noted that, when the wire length L is much smaller than the wavelength λ, the radiation is weak; wire length L to be compared with the wavelength, the wire will greatly increase the current, and thus can form a strong radiation.