©1990-2002 J.Paul Robinson, Purdue University
BMS 631 – LECTURE006.PPT
Interference and Diffraction:
Gratings
•
Diffraction essentially describes a
departure
from
theoretical
geometric optics
•
Thus a sharp objet casts an alternating shadow of
light and dark “patterns” because of interference
•
Diffraction
is the component that
limits resolution
•
3
rd
Ed. Shapiro p 83