Two-Color Multiple Slit Diffraction

[Fu-Kwun Hwang]

The Two-Color Multiple Slit Diffraction Model allows users to explore multiple slit diffraction by manipulating characteristics of the aperture and incident light to observe the resulting intensity.

The wavelengths of two monochromatic sources can be adjusted to illustrate the wavelength dependence of diffraction effects. The applet automatically calculates and displays the wavelength difference between the two sources.

The user controls the properties of the aperture including the number of slits, the slit separation and the slit width. When the slit width is set to zero, the slits are treated as point sources.

The intensity pattern of one or two monochromatic sources may be displayed . In addition, the combined intensity may also be displayed.

Credits

This version of the Two-Color Multiple Slit Diffraction Model was created by Taha Mzoughi based on the version developed by Michael Gallis.

Embed a running copy of this simulation
<applet code='users.ntnu.fkh.TwoColorMultipleSlitDiffraction_taha_pkg.TwoColorMultipleSlitDiffraction_tahaApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/2/ejs_TwoColorMultipleSlitDiffraction_taha.jar' name='TwoColorMultipleSlitDiffraction_taha4601' id='TwoColorMultipleSlitDiffraction_taha4601' width='765' height='530' mayscript=true><param name='draggable' value='true'></applet>
Embed a running copy link(show simulation in a popuped window)
<a href='http://www.phy.ntnu.edu.tw/ntnujava/msg.php?smfejs=4601' target='smfejs'>Run simulation</a>

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License

• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
• Upload worksheets as attached files to share with more users.

Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!

[elim]

Hi Prof Hwang,

The simulation is really great. Thumb up!

I am hoping that if you would guide me of how to modify your your simulation to add some new features which are required for some teaching demo.
- Have a concave and convex screen
- Rotate the parallel screen such that one side is nearer to the slits and the side is farther.
- Possible to have white light for both slits
- Possible to change the size of the double slits independently. (I know it sound strange.)

Do you have any Fraunhofer diffraction simulation that look Figure.5 on the following website?
http://www.marcuswinter.de/archives/1415
It would be good to vary the size of the slits or apertures.

Cheers.
Lee