Massachusetts Institute of Technology
Sign in

Ripple Tank: Single and Double Slit Diffraction and Interference

A ripple tank is placed above a mirror and a projection screen. A horizontal bar, whose frequency can be varied, taps the surface of the water and produces plane waves. The waves are incident on a barrier containing an adjustable opening.

With a narrow single slit opening we see a plane wave emerge as a spherical wave on the other side of the barrier. This can be explained by the Huygens-Fresnel principle which states that each point in the slit forms its own spherical wavefront source. With a wider slit, more point sources arise, causing interference patterns due to the larger angles involved with a broader spatial distribution of these sources.

Comments (2)

how does it do that

Posted almost 4 years by Anonymous 00:00:24

This thing is cool, I wanna make one.

Posted almost 4 years by Anonymous 00:01:47

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

Created
July 22, 2009 11:09
Category
Tags
License
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files


Viewed
61873 times

More from MIT Department of Physics Technical Services Group

Physics Demo -- Superconductor

Physics Demo -- Superconductor

Added over 8 years ago | 00:00:56 | 55760 views

Laser Diffraction and Interference

Laser Diffraction and Interference

Added over 7 years ago | 00:02:25 | 40370 views

Adjustable Capacitor with Dielectric

Adjustable Capacitor with Dielectric

Added over 7 years ago | 00:02:05 | 38652 views

Center of Mass Trajectory

Center of Mass Trajectory

Added 7 years ago | 00:01:30 | 54205 views

Moving Sand Cart Over a Rotating Surface

Moving Sand Cart Over a Rotating Su...

Added 7 years ago | 00:01:13 | 36839 views

MIT Physics Demo -- Jacob's Ladder and the Melting Nail

MIT Physics Demo -- Jacob's Ladder ...

Added over 8 years ago | 00:01:26 | 56637 views