Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
With the Simulated Double-Slit Interference Demonstration, quickly and confidently demonstrate the concept of wave interference. Determine how the interference pattern is affected by wavelength.

See more product details


(Select option to see volume pricing availability)

Product Details

Quickly and confidently demonstrate the concept of wave interference. Stack two identical circle patterns together on an overhead projector. Slowly slide one pattern over the other and the interference pattern will clearly develop before your eyes. Then, measure the angles of the interference bands to confirm the relationship between wavelength and slit separation. Repeat the demonstration using the larger-spaced circles to show how the interference pattern is affected by “wavelength.” Circle Pattern Masters are provided and can be photocopied onto transparency paper for students to follow along with the demonstration at their desks. Includes complete demonstration instructions.

Concepts: Interference pattern, wavelength, coherent light, diffraction.
Time Required: 15 minutes
Note: Requires an overhead projector. Student transparency paper is not provided.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Using mathematics and computational thinking

Disciplinary Core Ideas

MS-PS4.A: Wave Properties
MS-PS4.B: Electromagnetic Radiation
HS-PS4.B: Electromagnetic Radiation
HS-PS4.A: Wave Properties

Crosscutting Concepts

Systems and system models
Structure and function