Laser Diffraction - Razor Edge

Purpose

Diffraction of a laser beam by a sharp edge.

Equipment

Laser cart with razor edge insert on double cross carriage.

Images

m5-12

Description

Position the razor edge in the laser beam using the double cross carriage to see the classic knife edge diffraction pattern on a distant screen. The pattern can be seen on a near screen using a cylindrical lens. The lens may enhance the pattern on the distant screen.