When 2 waves meet at a point the resultant displacement at that point is equal to the sum of the displacements of teh individual waves.

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Superposition

Overlap of 2 waves at a point in space.

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Interference

Superposition of 2 progressive waves from coherent sources to produce a resultant wave with a displacement equal to the sum of the individual displacements of the 2 waves.

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Constructive interference

Superposition of waves in phase so that the resultant wave has a greater amplitude than the original waves.

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Destructive interference

Superposition of 2 waves in antiphase so they cancel each other out and the resultant wave has a smaller amplitude than the original waves.

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Coherence

2 wave sources or waves that have a constant phase difference.

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Maxima

The point of greatest amplitude in an interference pattern from constructive interference.

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Minima

The point of least amplitude in an interferennce pattern from deconstructive interference.

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Monochromatic

Light of a single frequency.

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Stationary (standing) waves

A wave that remains in a constant position with no net transfer of energy and is characterised by nodes and antinodes.

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Node

A point where the amplitude is always zero.

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Antinode

The position of maximum displacement on a standing wave.

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Fundamental mode of vibration

A vibration at the fundamental frequency.

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Fundamental frequency

The lowest frequency at which an object can vibrate.

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Harmonics

A whole-number multiple of the fundamental frequency.

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Other cards in this set

Card 2

Front

Overlap of 2 waves at a point in space.

Back

Superposition

Card 3

Front

Superposition of 2 progressive waves from coherent sources to produce a resultant wave with a displacement equal to the sum of the individual displacements of the 2 waves.

Back

Card 4

Front

Superposition of waves in phase so that the resultant wave has a greater amplitude than the original waves.

Back

Card 5

Front

Superposition of 2 waves in antiphase so they cancel each other out and the resultant wave has a smaller amplitude than the original waves.

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