Interference (B+35)

  B+35+0 Large wood model of a double slit with hinged waves.
  B+35+5 Acoustic interference with Quincke (trombone) tube and sonalert.
  B+35+10 Interference of sound waves from two speakers, same generator.
  B+35+12 Interference between two ultrasound sources (40 kHz).
  B+35+15 Interference in a ripple tank uses arc lamp or incandescent light.
  B+35+20 Beats with tuning forks on tuned cavities.
  B+35+25 Beats with two beer bottles blown manually.
  B+35+31 Moveable speakers create interference
  B+35+30 Beats from two speakers observed on an oscilloscope.