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Coherence
A property used to describe two waves with the same phase difference
Path Difference
The difference in distances travelled by two waves to the same point
Phase Difference
The difference between two particles on a wave or on different waves
Superposition
Two waves meeting at the same point and adding to create a new resultant wave
Constructive
Two waves adding to make a larger wave
Destructive
Two waves adding to make a smaller wave
Diffraction
The process that causes waves to spread through a gap or around a boundary
Diffraction Grating
A device comprised of equally spaced slits to create a spectrum pattern by diffracting and interfering light sources
Emission Spectrum
Range of wavelengths of light given off by changing energy levels in an atom
Absorption Spectrum
Range of wavelengths with energy levels in an atom missing
Energy Level
Specific distances that electrons can exist around an atom
Stationary wave
A wave that has no resultant energy transfer and remains in the same position
Progressive wave
A wave that transfers energy and appears to move
Node
A point on a stationary wave where the amplitude is zero
Antinode
A point on a stationary wave with maximum possible displacement
Resonance
The enlargement of amplitude of an oscillation when the driving frequency is equal to the natural frequency
Natural Frequency
Rate of vibration which causes resonance
Driving Force
Periodic push which causes resonance
Tension
Pulling force in a taut string
