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Waves 12.02

Essentials of measuring waves. Waves 12.02. Write a definition for each (no textbook  ). Amplitude Wavelength Period Frequency. Maximum displacement of a vibrating particle. Distance between two particles with same displacement and velocity. Time for one complete wave to pass a point.

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Waves 12.02

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  1. Essentials of measuring waves Waves12.02

  2. Write a definition for each(no textbook ) • Amplitude • Wavelength • Period • Frequency Maximum displacement of a vibrating particle Distance between two particles with same displacement and velocity Time for one complete wave to pass a point No. of complete waves passing a point each second

  3. Wave anatomy Peak-to-peak amplitude Wavelength RMS amplitude (Peak/√2) Crest or peak Amplitude Equilibrium Trough or peak Amplitude

  4. Draw examples of: • Reflection • Diffraction • Refraction • Interference

  5. Wave calculations • Period = 1/f • (Time for one cycle = 1/frequency in Hz) • Speed = dist/time • So, wave speed (c) = wavelength (λ)/period (1/f) • So, c = λ/(1/f) • So, c = fλ

  6. Phase difference • Radians (θ) • Relationship between radius (r) and arc length (s) • θ = s/r • So radians in a complete circle = 2πr/r • r/r cancels, so radians in a complete circle = 2π • So, phase difference = 2πd/λ • Convert to degrees: • Deg = rad.180/ π

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