Laser Diffraction - Variable Single Slit

Purpose

To demonstrate single slit diffraction.

Equipment

Laser cart with variable single slit.

Images

m1-02

Description

Position variable single slit in holder on cross-carriage in laser beam to obtain diffraction. Pattern can be shown on a distant screen, or the small screen shown in the picture. Magnification with the cylindrical lens can be used as necessary. Spread in the pattern as the slit is closed can easily be seen.

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). ◙James Mahoney, Laser Interfer