Two main types we'll study:
- ==> the usual sine wave undulation of
- slinky, string, jump rope, water wave, etc;
==> less often discussed are
- sound waves from tuning fork, guitar string, human voice, etc, and pressure waves within the earth
Q: "What's nu?"
A: "c over lambda!"
- frequency (nu, or f)
- wave speed (c or v)
- wavelength (lambda, )
- sound waves travel ~340 m/s in air
- light & radio waves travel ~3x10 E 8 m/s
- water surface waves travel 2-3 m/s near shore
- a few meters for ocean waves
- centimeters and meters for sound waves
- hundreds of nanometers (10E-9) for visible light waves
- measurements can be lengths, pressures or field strengths, depending on the type of wave involved.