Communication and waves module l

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Electromagnetic waves travel at the same speed in a vacuum, which is approximately 299,792 kilometers per second (the speed of light).

Front

What types of signals can transmit information if you know the code?

Back

All types of signals, including sound, light, and radio waves, can transmit information if the code is known.

Front

What is Morse code?

Back

Morse code is a method of encoding text characters as sequences of dots and dashes, used for transmitting messages.

Front

What does AM stand for in modulation?

Back

AM stands for Amplitude Modulation, a technique used to encode information in a carrier wave by varying its amplitude.

Front

What does FM stand for in modulation?

Back

FM stands for Frequency Modulation, a technique used to encode information in a carrier wave by varying its frequency.

Front

What is the primary difference between AM and FM modulation?

Back

The primary difference is that AM varies the amplitude of the carrier wave, while FM varies the frequency.

Front

What is the range of electromagnetic waves?

Back

The electromagnetic spectrum ranges from radio waves, through microwaves, infrared, visible light, ultraviolet, X-rays, to gamma rays.

Front

What is the principle of superposition in wave theory?

Back

The principle of superposition states that when two or more waves overlap, the resulting wave is the sum of the individual waves.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

What is a carrier wave?

Back

A carrier wave is a waveform (usually a sine wave) that is modulated with an information signal for the purpose of conveying information.