INTERFERENCE.--The crossing or superposing of two sets of electric waves of the same or slightly different lengths which tend to oppose each other. It is the untoward interference between electric waves from different stations that makes selective signaling so difficult a problem.
INTERMEDIATE WAVES.--See Waves.
IONIC TUBES.--See Vacuum Tubes.
INTERNATIONAL CODE.--See Code, International.
JAMMING.--Waves that are of such length and strength that when they interfere with incoming waves they drown them out.
JOULE.--The energy spent in 1 second by a flow of 1 ampere in 1 ohm.
JOULE'S LAW.--The relation between the heat produced in seconds to the resistance of the circuit, to the current flowing in it.
KENOTRON.--The trade name of a vacuum tube rectifier made by the Radio Corporation of America.
KICK-BACK.--Oscillating currents that rise in voltage and tend to flow back through the circuit that is supplying the transmitter with low voltage current.
KICK-BACK PREVENTION.--See Prevention, Kick-Back.