Slides on waves

1. GENERAL WAVE PROPERTIES SECONDARY 3 PHYSICS

7. Parts of a Wave amplitude trough Peak / crest One wavelength

8. Distance travelled by the wave in 1 second. Unit: ms -1 Wave speed Time taken to produce 1 complete wave Period Number of complete waves produced in 1 second Frequency Shortest distance between two points in phase Wavelength Two points that are moving in the same direction at the same speed and having the same displacement from rest Phase Maximum displacement from rest position Amplitude The high points / low points in a wave Crests / trough Meaning Terms

9. Metres per second (m/s) Wave speed Seconds (s) Period Hertz (Hz) Frequency Metres (m) Wavelength M etres (m) Amplitude Units Terms

10. Wave Equation v = f  Speed of wave [ms -1 ] Frequency [Hz] Wavelength [m]

11. Example: The speed of sound is 330 ms -1 . If the wavelength of the sound was 4m, what was the frequency of the sound? Solution: v = f  330 = f (4) f = 330/4 = 82.5 Hz

12. Relationship between T and f Period [s] Frequency [Hz]