4.4 - Wave Characteristics

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Mind Map by wondersnail, updated more than 1 year ago
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Created by wondersnail about 6 years ago
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Physics HL (4 - Simple Harmonic Motion and Waves) Mind Map on 4.4 - Wave Characteristics, created by wondersnail on 03/22/2014.

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4.4 - Wave Characteristics
1 4.4.1
1.1 Wave pulse- a single, instant crest?
1.2 Continous wave- A wave of constant amplitude and frequency; the wave goes up and down forever (unless damped!)
2 4.4.3
2.1 Transverse wave- A wave in which the direction of disturbance is perpendicular to the direction of travel
2.1.1 Example: Wave in a string
2.2 Longitudinal wave- A wave in which the direction of disturbance is parallel to the direction of travel
2.2.1 Example: Wave in a spring
3 4.4.2
3.1 Progressive waves transfer energy.
4 4.4.4
4.1 Wavefront- a line joining all point in a wave that are in phase
4.2 Ray- lines drawn to show the direction of the wave, perpendicular to the wavefront
5 4.4.5
5.1 Crest- maximum positive displacement from equilibrium position. Top of the wave
5.2 Trough- maximum negative displacment from equilibrium position. Bottom of the wave
5.3 Compression- pushing together of a longitudinal wave, increased frequency, decreased wavelength
5.4 Rarefaction- spreading out of the longitudinal wave, decreasing frequency, increased wavelength
6 4.4.6
6.1 Wavelength- distance between two consecutive points of a wave that are in phase
6.2 Wave speed- distance travelled by the wave profile per unit time
6.3 Intensity- Power transferred by a wave per unit area
7 44.8
7.1 If frequency is f, the time taken for a wave to pass one cycle is 1/f.
7.1.1 Velocity = distance over time
7.1.1.1 The distance moved in one cycle is one wavelength
7.1.1.1.1 So the velocity of a wave is the wavelength divided by 1/f, which is equal to the wavelength times the frequency
8 4.4.9
8.1 All electromagnetic waves thravel with the same wave speed in free space!
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