Using Electromagnetic Waves

Radio waves travel at the speed of light, which is mc001-1.jpg. What is the wavelength of a mc001-2.jpg Hz radio wave?

3.00 m

What is often used to improve the quality of a broadcast?

Repeater stations

How do very long radio waves reach stations beyond the curvature of the Earth?

They bounce off a charged layer of the atmosphere

Figure 18-1 shows a carrier wave modified by

amplitude modulation.

For radio broadcast, sound signals are converted to

electromagnetic waves.

Communications satellites transmit UV waves.

false

Telecommunications information is often carried by ____.

fiber-optic cable

Figure 18-2 shows a carrier wave modified by

frequency modulation.

A system of satellites, base stations, and receivers is called ___________.

radar

Each radio station broadcasts on a specific frequency called a carrier wave.

true