Tìm kiếm
Hertz
01
vô tuyến điện
German physicist who with James Franck proved the existence of the stationary energy states postulated by Bohr (1887-1975)
02
vô tuyến điện
German physicist who was the first to produce electromagnetic waves artificially (1857-1894)
03
vô tuyến điện
a unit that is used in measurement of the frequency of sound and radio waves
