Nuclear energy may refer to: . Nuclear power, the use of sustained nuclear fission or nuclear fusion to generate heat and electricity; Nuclear binding energy, the energy required to split a nucleus of an atom; Nuclear potential energy, the potential energy of the particles inside an atomic nucleus; Nuclear Energy, a bronze sculpture by Henry Moore in the University of Chicago

Before thermionic valves were invented, Philipp Lenard used the principle of grid control while conducting photoelectric experiments in 1902. The first vacuum tube used in radio was the thermionic diode or Fleming valve, invented by John Ambrose Fleming in 1904 as a detector for radio receivers.It was an evacuated glass bulb containing two electrodes, a heated filament …