CAIE A-Level Physics 7.1.2 Displacement, Amplitude, Phase, Period and Frequency

Practise defining and reading wave quantities such as amplitude, wavelength, period, frequency and phase difference from diagrams or time records.

Exam points

define displacement, amplitude, phase difference, period, frequency and wavelength in a wave description
read wave diagrams or time records to determine amplitude, wavelength, period, frequency or phase difference
relate wave quantities and compare phase or displacement at different positions or times

[Maximum number: 2]

A loudspeaker oscillates with frequency f to produce sound waves of wavelength $\lambda$ . The loudspeaker makes N oscillations in time t.

State expressions, in terms of some or all of the symbols $f, \lambda$ and N, for:
1. the distance moved by a wavefront in time t

distance =

2. time t.

\text { time } t=

1. $N \lambda$

B1

2. N / f

B1

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