L2.1 & 2: Communication and Signal Flashcard

Front

What type of wave is used most often in modern communication devices?

Back

Electromagnetic waves

Front

What TWO properties can you change when encoding information into a wave?

Back

Frequency and amplitude

Front

Which type of wave was used in telegraphs to send Morse code messages?

Back

Radio

Front

What does AM stand for in radio waves?

Back

Amplitude Modulation

Front

What does FM stand for in radio waves?

Back

Frequency Modulation

Front

How does binary (digital) information represent data?

Back

With a series of 1s and 0s

Front

What is the main difference between AM and FM radio waves?

Back

AM changes amplitude, while FM changes frequency.

Front

What is a wave?

Back

A disturbance that transfers energy through space or matter.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Approximately 299,792 kilometers per second (the speed of light).

Front

What is the medium for sound waves?

Back

Sound waves require a medium (solid, liquid, or gas) to travel.