Laser Diffraction - Fixed Double Slits

Purpose

To demonstrate double slit interference using several calibrated pairs of slits.

Equipment

Laser cart with fixed double slits.

Images

m1-11

Description

A slide containing four sets of double slits is positioned in the laser beam using a slide holder on a cross-carriage mount. Any of the four sets of slides can easily be slid into the beam. The four sets of slits have slit width a and separation d as follows: ◙◙a=0.04mm, d=0.25mm; a=0.04mm, d=0.50mm; ◙◙a=0.08mm, d=0.25mm; a=0.08mm, d=0.05mm.

References

David Dutton, M Parker Givens, and Robert E. Hopkins, Some Demonstration Experiments in Optics Using a Gas Laser,◙Spectra-physics Laser Technical Bulletin, (1963). ◙Paul A. Young, A Student Experiment in Fresnel Diffraction, AJP 32, 367-369, (1964). ◙David Dutton, M. Parker Givens and Robert E. Hopkins, Some Demonstration Experiments in Optics Using a Gas Laser, AJP 32,◙355-361, (1964). ◙Haven Whiteside, Laser Optics Experiments and Demonstrations, AJP 33, 487-492, (1965). ◙Roy H. Biser, Modern Methods for the Study of Optical Diffraction, TPT 7, 158-161, (1969). ◙E. Fortin, Direct Demonstrati