Q: Is a Radio the technology of using radio waves to carry information? ¶
A: Yes, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.
Q: Is a Radio a digital cell phone system for military? ¶
A: Yes, and police and ambulances.
Q: Was a Radio used to pass on orders and communications between armies and navies on both sides in World War I? ¶
A: Yes, Germany used radio communications for diplomatic messages once it discovered that its submarine cables had been tapped by the British.
Q: Is a Radio pioneered by radio amateurs and later became commercially important? ¶
A: Yes, and including FM, single-sideband , AM, digital packet radio and satellite repeaters.
Q: Was a Radio unique among methods of dramatic presentation in that it used only sound? ¶