When these electromagnetic waves escape from the conductor into space, they are said to be radiated by the conductor, hence the name radio waves.
举一反三
- electromagnetic waves
- How is television different from radio A: Sound is changed into electromagnetic waves. B: Light is changed into electromagnetic waves. C: Both sound and light are changed into electromagnetic waves. D: Either sound or light is changed into electromagnetic waves.
- When you call a friend in Puerto Rico, the radio waves from your cell phone first travel to ________.
- The British used radio waves because they ________.
- Without greenhouse gases, the heat radiated from the Earth's surface<br/>would____. A: remain where it is B: warm up the Earth C: escape to space