| Optics > Diffraction |
DCS# 6C20.40 |
ZONE PLATE
APPARATUS
zone
plate
|
202-21-E5 |
| laser |
202-21-B6 |
beam
expander
|
202-21-B5 |
ground glass screen
|
202-21-D4 |
| video camera |
202-09-C4 |
DESCRIPTION
Show that the zone plate acts as a
converging lens by focusing the expanded laser beam on the ground glass
screen.
NOTES
Use macro setting on video camera and
stop down aperture.