CAIE A-Level Physics AS 7.1.5 V F Questions

Use V = fλ to relate wave speed, frequency and wavelength in wave problems.

Exam points

Use V = fλ to relate wave speed, frequency and wavelength in wave problems.

[Maximum number: 2]

The frequency of the wave in (a) is 16 kHz . The distance between particles X and Y is 0.19 m .

Calculate the speed of the wave as it travels through the medium. $\mathrm{ms}^{-1}$

$\begin{aligned} \lambda =2 \times 0.19 =0.38 \mathrm{~m} \end{aligned}$ $v=f \lambda$ $\begin{aligned} v=\left(16 \times 10^{3}\right) \times 0.38 v=6100 \mathrm{~m} \mathrm{~s}^{-1} \end{aligned}$

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CAIE A-Level Physics AS 7.1.5 V F Questions question 1