Wavelength and frequency
2 marks · EasyA wave has a frequency of 50 Hz and a wavelength of 0.12 m. Calculate the speed of this wave.
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6 m/s (±0.01)
Common mistakes: Multiplying wrongly or using inverse; Forgetting to include the unit
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Marking points
M1 · 1 mark · Uses the wave speed equation: v = f × λ.
A1 · 1 mark · Substitutes correctly to get v = 50 × 0.12 = 6 m/s.
Worked solution
v = f × λ = 50 × 0.12 = 6 m/s