Progressive Waves
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1. The document discusses progressive waves, describing them as vibrations that transfer energy and information through a medium over time. 2. It explains key wave concepts such as wavelength, frequency, amplitude, phase, and path difference which are important for understanding how waves propagate. 3. Graphs and equations are presented showing the relationships between wavelength, frequency, wave speed, phase difference, and path difference.
Progressive Waves
- 2. “ Looking out into the immensity of the universe, we stand at the shores of the cosmic ocean. Yet our earthly seas are no less beautiful, and the crashing surf reminds us that most of what we know about our world comes from information carried by waves.” Carl Sagan
- 3. Waves A basic concept of physics Progressive waves Describing waves Longitudinal Transverse
- 4. Graphical representation Displacement - time graph Transverse mechanical wave Longitudinal wave Amplitude Wavelength Frequency
- 6. Wavelength, frequency and wave speed A wave source vibrates at f vibrations per second particles of transmitting medium vibrate at same frequency 1 complete vibration = 1 wave generated disturbance = m from source = f or c = f Note: this is not on data sheet
- 7. Phase
- 8. A and B: in phase B and C: in antiphase Phase difference Calculating for x 1 and x 2 = 2 ( x 1 - x 2 ) If x 1 - x 2 integer number s, = 2 , 4 , 6 etc
- 10. Waves emitted from a and B in phase At P: relative phase depends on distance travelled Path difference = BP – AP Path difference = n constructive Path difference = (n + ½ ) destructive