Slitfilms And Long Filament Bulb

Purpose

Diffraction and interference by various slits and combinations of slits.

Equipment

Long filament bulb with Cornel slitfilm

Images

m1-32

Description

This uses the Cornell slitfilm 3"x4" slide to show various diffraction phenomena using a long-filament incandescant bulb. Set up for individual viewing: the observer holds the slit an inch or so in front of his or her eye and views the filament through the slit(s) of interest to view diffraction and interference. The Cornel slitfilm includes single, double, and multiple slits of various size and spacing.

References

Directions for Using the Cornell Interference and DiffractionSlitfilm, The National Press.