Massachusetts Institute of Technology
Sign in

Soap Film Oscillation

A wire frame is dipped in bubble solution and placed in front of a speaker. At certain frequencies, the soap film oscillates in symmetrical patterns called normal modes.

A light is reflected off the soap film through a lens onto the wall to show these normal modes as the frequency of the function generator is increased. The first set of normal modes occur at frequencies lower than we can hear with our ears, which is why you can't hear the speaker in the video until the frequency is increased.

Comments (1)

Try using the speed switcher button (says “HD Auto” by default) and select the lowest setting.

Posted almost 6 years by brew

You need to log in, in order to post comments.

Created
June 30, 2009 14:12
Category
Tags
License
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files


Viewed
49432 times

More from MIT Department of Physics Technical Services Group

MIT Physics Demo -- Telegraph Transmitter

MIT Physics Demo -- Telegraph Trans...

Added over 8 years ago | 00:00:36 | 53954 views

MIT Physics Demo -- Forces on a Current-Carrying Wire

MIT Physics Demo -- Forces on a Cur...

Added over 8 years ago | 00:00:49 | 43698 views

MIT Physics Demo -- Bicycle Wheel Gyroscope

MIT Physics Demo -- Bicycle Wheel G...

Added 8 years ago | 00:01:28 | 178437 views

MIT Physics Demo -- No-Win Tug of War

MIT Physics Demo -- No-Win Tug of War

Added 8 years ago | 00:00:33 | 41850 views

MIT Physics Demo -- Back "emf" in a Large Solenoid

MIT Physics Demo -- Back "emf" in a...

Added over 8 years ago | 00:00:23 | 69058 views

MIT Physics Demo -- Galvanometer Principle

MIT Physics Demo -- Galvanometer Pr...

Added 8 years ago | 00:00:47 | 52752 views