Wavelength and frequency

3 marks · Normal

Ocean waves travel at 12 m/s and have a frequency of 0.2 Hz.

Calculate the wavelength of the ocean waves. Give your answer with the correct unit.

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60 m (±1)

Also accept: 60.0 m

Common mistakes: Multiplying instead of dividing

Show mark scheme and worked solution

Marking points

M1 · 1 mark · Rearranges v = f × λ to λ = v / f. (follow-through)

M1 · 1 mark · Substitutes correctly: λ = 12 / 0.2. (follow-through)

A1 · 1 mark · Gives correct answer: 60 m (accept answers 59–61 m). (follow-through)

Worked solution

λ = v / f = 12 / 0.2 = 60 m.