Wave Motion — A/L Physics

How do I practise Wave Motion?

1 question with a worked solution

1. A progressive transverse wave is represented by the wave function y = 0.05 sin(20π t - 2π x), where x and y are in meters and t is in seconds. What are the frequency and wavelength of this wave?
   1. A) Frequency = 10 Hz, Wavelength = 2.0 m
   2. B) Frequency = 10 Hz, Wavelength = 1.0 m
   3. C) Frequency = 20 Hz, Wavelength = 2.0 m
   4. D) Frequency = 5 Hz, Wavelength = 0.5 m
   Check my answer

   Correct answer: B) Frequency = 10 Hz, Wavelength = 1.0 m

   Comparing with the standard equation y = A sin(ω t - k x): ω = 20π rad s⁻¹ and k = 2π rad m⁻¹. Frequency f = ω / (2π) = 20π / 2π = 10 Hz. Wavelength λ = 2π / k = 2π / 2π = 1.0 m.

   Show worked solution

   Step 1: ω = 2π f = 20π => f = 10 Hz. Step 2: k = 2π / λ = 2π => λ = 1.0 m. Answer: Frequency = 10 Hz, Wavelength = 1.0 m.
   Modelled on: the A/L Physics examination pattern

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Where does Wave Motion fit in the syllabus?

Unit 3.2 · Year 1 · Term 2