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physics yr 12 - Coggle Diagram
physics yr 12
waves
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transverse
one in which vibrations are at a 90 degree angle to the direction in which the wave is travelling for example water waves
frequency
The frequency of a wave is the number of complete waves passing a fixed point in a second frequency is given the symbol F and is measured in units called hertz.
Wavelength
The wavelength of a wave is the distance between two consecutive crests or throughts wavelength is given a symbol λ is the Greek letter L and is pronounced lamada
Amplitude
The amplitude of a wave is the greatest displacement of the wave from this undisturbed position Amplitude is measured in meters
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Echo techniques
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SONAR
sonar stands for sound navigation and ranging and was originally developed to detect submarines in the early twentieth century uses sound and ultra sound speed in air 340m/s speed in water 1500m/s needs a medium cannot travel in vacuum sonar relatively short distance
RADAR
radar stands for Radio detection and ranging and was originally developed during world war II to detect enemy aircrafts and find the distance from the radar station electromagnetic waves travel at 3X10 to the power of 8 m/s (3,000,000,000 m/s ) travel in vacuum monitor aircraft