The Wave Equation (AQA GCSE Physics Combined Science): Flashcards

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The Wave Equation
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Wave speed definition

Speed at which energy is transferred through medium

Wave equation

v=fλv = f \lambda

How to find speed of sound in air

Distance travelled ÷ time taken

Main problem measuring sound speed

Different reaction times between observers

How to reduce timing errors

Use multiple observers and calculate mean value

Wavelength (λ\lambda) definition

Distance between same points on two consecutive waves

Amplitude (yy) definition

Distance from equilibrium to maximum displacement

Frequency (ff) definition

Number of waves passing a point per second

Period (TT) definition

Time for one complete wave to pass a point

Period-frequency equation

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

How to measure wavelength on diagram

Distance from crest to crest (or trough to trough)

How to measure amplitude on diagram

Height from equilibrium line to crest or trough

Effect of increasing frequency on velocity

Wave velocity increases

Effect of increasing wavelength on velocity

Wave velocity increases

Relationship between period and frequency

Inversely proportional

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