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Diffraction and Interference

Demonstrates wave diffraction and interference using a coherent light source. This demo uses the PASCO kit. You can easily show single slit diffraction patterns and illustrate how patternsfrom two slits interfere. Also, the effects of changing the apertureof the slit and the spacing between slits can be shown. The kit has also two different lasers: green and red, which allows you to illustrate the effects of wavelength on the patterns.
ID: d0006
Set up time:
2 minutes in class.
Requires:
Electricity outlet, extension cord, and power strip. Components.
Notes:
You may need assistance the first time you use this demo.Using a concave lens between the laser and the diffraction plate helps to spread the beam enough to cover the whole slitand hence improves the visualization of the patterns.
Figures: PicPatch
Documents:
Comments:

Table of Components

Qty. name location notes
1 PASCO kit W106; Central Cabinets;
1 small lens W106; Central Cabinets;
1 lens holder W106; Central Cabinets;
pic_1
Fig 1. Setup
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Fig 2. Optical table with both lasers and diffraction disks
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Fig 3. Another angle of the optical table.