The wave equation
I can describe how the frequency of a wave moving through a particular medium is related to its wavelength.
The wave equation
I can describe how the frequency of a wave moving through a particular medium is related to its wavelength.
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Lesson details
Key learning points
- The speed of a wave depends on the medium it is travelling through
- The speed of a wave does not depend on its frequency
- For a given wave speed, the higher the frequency, the shorter the wavelength
- For a given wave speed, the longer the wavelength, the lower the frequency
- Wave speed = frequency x wavelength
Keywords
Wave equation - wave speed = frequency × wavelength (v = f x λ)
Wave speed - the speed of a wave in a particular medium (material)
Frequency - the number of waves produced each second. Frequency is measured in Hertz (Hz)
Wavelength - the distance between one wave crest (or trough) and the next
Lambda - (λ) the symbol used for the wavelength of a wave
Common misconception
In, v = f x λ, speed is dependent on frequency and wavelength, rather than the medium.
Focus on speed being property of a medium and equation not being as an equation with three interdependent variables.
To help you plan your year 10 physics lesson on: The wave equation, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 physics lesson on: The wave equation, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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Explore more key stage 4 physics lessons from the Measuring waves unit, dive into the full secondary physics curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
shake the end up and down a greater distance
shake the end up and down a smaller distance
shake the end up and down more times each second
shake the end up and down less times each second
Exit quiz
6 Questions
f in Hz
λ in m
T in s
v in m/s