Decades of his unmistakable voice took over the radio waves, and news broadcasts dealt with little else.
The idea is fairly simple: take a sealed metal canister and fill it with radio waves, which are a low-energy form of light.
Any risk comes not from the phone itself, of course, but from the radio waves it emits.
A ship on hyperdrive could log light-years an hour, but radio waves still had to travel 186,000 mps.
I'll call you now and then, until the radio waves get lost, to check the course with you.
The wave lengths of these rays range from shorter than anything now used in broadcasting to the longest kind of radio waves.
The "grid" is connected to the aerial wire to intercept the radio waves.
But the spoken message had been too brief to get a fix on the direction of its radio waves.
What will happen, however, if someone locates the source of the radio waves?
The two radio waves impressed on us now will be out of step and the interference will instantly make us visible.
|radio wave |
A very low frequency electromagnetic wave (from roughly 30 kilohertz to 100 gigahertz). Radio waves are used for the transmission of radio and television signals; the microwaves used in radar and microwave ovens are also radio waves. Many celestial objects, such as pulsars, emit radio waves. See more at electromagnetic spectrum.
Waves at the end of the electromagnetic spectrum with the lowest frequency (less than 300 megahertz) and the longest wavelength (from a few feet to many miles). Because of their low frequency, radio waves carry very little energy compared to other electromagnetic waves. (See Planck's constant.)
Note: Radio waves can pass through the atmosphere and therefore are very useful for communication. Commercial, short-wave, and citizens' band radio are broadcast with radio waves, as is television.