The Wave Equation (AQA GCSE Physics): Flashcards

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The Wave Equation
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Wave speed

Speed wave moves through medium (energy transfer)

Wave speed equation

v=fλv = f \lambda

How to measure speed of sound in air

Distance travelled ÷ time taken

Problem with sound experiment

Different reaction times for each person

Reduce errors in sound experiment

Many observers, discard anomalies, calculate mean

Wavelength (λ\lambda)

Distance between same points on consecutive waves

Amplitude (yy)

Distance from equilibrium to maximum displacement

Frequency (ff)

Number of waves passing a single point per second

Period (TT)

Time for whole wave to pass a single point

Period-frequency equation

T=1fT = \frac{1}{f}

How to measure wavelength on diagram

Crest to crest or trough to trough

How to measure amplitude on diagram

Equilibrium line to crest or trough

In v=fλv = f\lambda, if frequency increases

Velocity increases (when wavelength also increases)

In v=fλv = f\lambda, if wavelength increases

Velocity increases (when frequency also increases)

Relationship between period and frequency

Inversely proportional

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