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Mechanical wave
Made from disturbances or vibrations, Waves that require a physical medium (solid, liquid, or gas) to travel (ex. sound waves).
Electromagnetic spectrum
The complete range of EM waves arranged by frequency (or wavelength).
Composition
Continuous range from Low to high frequency
Visible light
Small portion of the (~3 kHz - 300 GHz).
spectrum we can see (400-700 nm).
Fundamental differences
As frequency increases, wavelength decreases and energy increases
Noise
Unwanted electrical signal
Interference
Overlap of signals causing distortion.
Jamming
Intentional interference to disrupt communication.
Intrusion
Unauthorized signal entering a system
Detectors/Beacons
Devices or transmitters used for locating or navigating