Optics > Diffraction

DCS# 6C20.15

---

KNIFE EDGE DIFFRACTION

---

---

APPARATUS
 

diverging lens, f = -11 cm	202-21-E5
diverging lens, f = -20 cm	202-21-E5
two lens holders	113-01-C6
ring stands and clamps	202-01
laser	202-21-B6
razor blade on rod	202-21-B5
large ground glass screen	202-21-D4
video camera	202-09-C4

---

DESCRIPTION

The diffraction pattern produced by the edge of razor blade in the path of the laser beam is projected on a screen.

NOTES

Use macro setting on video camera.  Stop down aperture.