Refraction of sound waves
Experiment no.: 5.9.4
Revised
since 04/24
An air balloon filled with carbon dioxide functions as a converging lens for sound waves, while a balloon filled with helium acts as a diverging lens.
Comment: The video shows an out-dated set-up. The video also uses hydrogen instead of helium, which may no longer be used for safety reasons.
Comment: The video shows an out-dated set-up. The video also uses hydrogen instead of helium, which may no longer be used for safety reasons.
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Images for this experiment
Documents for this experiment
Schematic diagram
Plane wave front
Spherical wave
Wave front
Interference at point P
Intensity distribution
Diffraction at slit
Law of reflection
Law of refraction
Fermat's principle
Refraction and total reflection
Defocusing acoustic lens
Focusing acoustic lens