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 7 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
51138 times

More from MIT Department of Physics Technical Services Group

Physics Demo -- Magnetic Motor

Physics Demo -- Magnetic Motor

Added over 9 years ago | 00:01:29 | 79915 views

Fluorescent and Neon Tubes in an Electric Field

Fluorescent and Neon Tubes in an El...

Added over 7 years ago | 00:02:02 | 43572 views

MIT Physics Demo -- Resonant RLC Circuit

MIT Physics Demo -- Resonant RLC Ci...

Added over 9 years ago | 00:00:46 | 61626 views

Hinged Stick and a Falling Ball

Hinged Stick and a Falling Ball

Added 7 years ago | 00:01:23 | 23988 views

Coupled Air Carts

Coupled Air Carts

Added over 8 years ago | 00:07:38 | 55073 views

Adjustable Capacitor with Dielectric

Adjustable Capacitor with Dielectric

Added over 8 years ago | 00:02:05 | 40527 views