Using the wave speed equations
I can calculate the speed, frequency or wavelength of a wave using the wave equation.
Using the wave speed equations
I can calculate the speed, frequency or wavelength of a wave using the wave equation.
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Lesson details
Key learning points
- The speed of wave can be caluated using wave speed = frequency × wavelength.
- The speed of a wave can be caluated using wave speed = distance ÷ time.
- The choice of equation to use to caluate wave speed depends on the information provided in the question.
- Prefixes can be used with units to show very large or very small values.
- The frequency of a wave does not change as it crosses a boundary from one wave medium into another.
Keywords
Wave equation - wave speed = frequency × wavelength (v = f × λ)
Wave speed - The speed of a wave through a medium. Given by the wave equation: wave speed = frequency × wavelength (v = f × λ)
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 is the wavelength of the wave.
Prefix - A prefix is added to units to represent large or small values , for example 1 km = 1000 m and 1 mm = 0.001 m
Common misconception
In, v = f × λ, speed is dependent on frequency and wavelength, rather then 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: Using the wave speed equations, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 physics lesson on: Using the wave speed equations, download all teaching resources for free and adapt to suit your pupils' needs.
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Starter quiz
6 Questions
Exit quiz
6 Questions
