Stationary Waves (Leaving Cert Physics): Flashcards

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Stationary Waves
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Wave formed by identical waves in opposite directions

Stationary wave (standing wave)

Conditions needed for stationary wave formation

Identical frequency & amplitude, opposite directions

Points of zero amplitude in stationary wave

Nodes

Points of maximum amplitude in stationary wave

Antinodes

Position of antinodes relative to nodes

Halfway between consecutive nodes

Distance between consecutive nodes

λ2\frac{\lambda}{2}

Distance between consecutive antinodes

λ2\frac{\lambda}{2}

Distance from node to next antinode

λ4\frac{\lambda}{4}

Process creating stationary waves

Wave interference

Interference type creating nodes

Destructive interference

Interference type creating antinodes

Constructive interference

How stationary wave frequency relates to source waves

Equal to frequency of travelling waves

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