# 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.

## Slide deck

## 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.

### 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.

### 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

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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