Frequency: GCSE Physics Definition

What is frequency?

In GCSE physics, frequency is a measure of the number of complete waves passing a fixed point per second. Frequency has the unit hertz (Hz) which is equivalent to ‘per second’.

Frequency and period are intrinsically related; frequency counts the number of waves passing a fixed point per second, while period measures the time taken for one complete wave to pass a fixed point. 

The equation for frequency and period is:

Where:

• f = frequency, measured in hertz (Hz)

• T = period, measured in seconds (s)

The frequency of a wave is also related to its wavelength. Higher frequency waves have shorter wavelengths and lower frequency waves have longer wavelengths. 

Frequency revision resources to ace your exams

You can strengthen your understanding of frequency by using our revision notes tailored specifically for the AQA, Edexcel, WJEC and OCR exam boards.

You can practice wave questions and calculations with helpful guidance and examiner tips using our exam board specific GCSE Physics exam questions. 

Explore Our GCSE Physics Revision Resources