Space Phone

 

Code Number: 3B25.67

Demo Title: Culvert Whistlers

Condition: Excellent

Principle: Culvert Whistlers

Area of Study: Astronomy

Equipment: 

Space Phone or Slinky.

Procedure:

See also: 3B25.67 in Oscillations/Acoustics and 8A70.70 in Astronomy.

The "Space Phone" allows you to hear whistlers as the speed of sound transmission through the spring is wavelength dependant.  A long Slinky can also be used for this demonstration.

References:

  • Frank S. Crawford, "Culvert Whistlers Revisited", AJP, Vol. 56, # 8, Aug. 1988, p. 752.
  • Frank S. Crawford, "Erratum : "Slinky Whistlers", AJP, Vol. 55, # 10, Oct. 1987, p. 952
  • Frank S. Crawford, "Slinky Whistlers", AJP, Vol. 55, # 2, Feb. 1987, p. 130. 
  • "160, Slinky Sound Off!",  Christopher P. Jargodzki and Franklin Potter,  Mad About Physics, p. 60, 204.
  • Jearl Walker, "3.77, Culvert Whistlers", The Flying Circus of Physics, p. 176.
  • Jearl Walker, "3.78, Slinky Whistlers", The Flying Circus of Physics, p. 176.
Whistlers - Geomagnetosphere Activity