Back to our radio signal. The electrons in our wire are moving, but not in one direction. These electrons are moving back and forth. Actually, the wave displayed in the activity is a ...

It sends out radio waves and "listens" to how the waves come back, which reveals the shape of whatever they have hit. Some researchers have used radio waves to detect concealed weapons such as ...

Researchers at the University of Pennsylvania are developing a robot with an advanced radio-based sensing system that could ...

Telescopes around the world have spotted a monster radio jet streaming from a quasar dating back to the first 1 billion years ...

FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...