Understanding rain is particularly important with regard to the propagation of electromagnetic signals.

There has never been an electromagnetic signal tight and true enough to carry significant transmissions that distance.

If contact were to take place through electromagnetic signals, these issues would not arise.

Radio is a way to send electromagnetic signals over a long distance, to deliver information from one place to another.

As they collect data on Soviet radar and other electromagnetic signals.

There are various techniques available to study and measure the electromagnetic signals of the body.

It's probably just a civilian aircraft off track with a misassociation of the electromagnetic signal.

An electromagnetic signal does not have a current or voltage.

The "prime" in this formula appears because the electromagnetic signal travels at the speed of light.

This current and the voltage causes an electromagnetic or radio signal to be radiated.