Describing waves

2 marks · Normal

State what is meant by the time period of a wave and explain how it relates to frequency, including the correct formula.

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Time period is the time for one complete wave to pass a point. It is the inverse of frequency: T = 1 / f.

Common mistakes: Forgetting to state the formula; Mixing up frequency and period

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Marking points

B1 · 1 mark · Gives correct definition of time period.

B1 · 1 mark · States correct relationship/formula: T = 1/f.

Worked solution

The time period is the time taken for one wave to pass a point (one cycle). It is related to frequency by T = 1 / f.