Radio Waves and Microwaves

These flashcards cover the key concepts and vocabulary from the lecture on Radio Waves and Microwaves.

Radio Waves

The lowest-energy, lowest-frequency, and longest-wavelength electromagnetic waves.

Electromagnetic Waves

Waves that are produced by alternating current and can travel through the atmosphere.

Ionosphere

A layer of charged particles in the upper atmosphere that reflects medium wavelength radio waves for long distance communication.

Digital Radio

Radio that uses digital signals for better-quality reception and reduced noise and interference.

Microwaves

Very short radio waves that are high-frequency and high-energy.

Reflection

The bouncing back of microwaves from metal surfaces.

Heating

The process by which microwaves cause materials to vibrate, resulting in heat.

Interference

The problem that occurs when multiple radio stations use similar transmission frequencies.

Transmission

The process of sending information through waves like radio and microwaves.