Waves
Definitions: Waves
Exam question
For a progressive wave, state what is meant by wavelength.
9702/21 · May/Jun 2021 · Q4(a)
Model answer
The distance between adjacent wavefronts.
Exam question
For a progressive wave on a stretched string, state what is meant by amplitude.
9702/23 · Oct/Nov 2021 · Q5(a)
Model answer
The maximum displacement of a point on the string from its equilibrium position.
Exam question
For a progressive wave, state what is meant by its period.
9702/22 · May/Jun 2021 · Q4(a)
Model answer
The time for one complete oscillation.
Exam question
For a progressive wave, state what is meant by the frequency.
9702/23 · May/Jun 2023 · Q4(a)
Model answer
The number of wavefronts passing a fixed point per unit time.
Exam question
By reference to the direction of propagation of energy, state what is meant by a transverse wave.
9702/22 · Feb/Mar 2024 · Q5(a)
Model answer
A wave in which oscillations are perpendicular to the direction of energy propagation.
Exam question
By reference to the direction of transfer of energy, state what is meant by a longitudinal wave.
9702/21 · Oct/Nov 2021 · Q4(a)
Model answer
A wave in which oscillations are parallel to the direction of energy transfer.
Exam question
State the meaning of polarisation.
9702/21 · Oct/Nov 2022 · Q4(a)(i)
Model answer
The oscillations are restricted to one direction perpendicular to the direction of wave propagation.