This preview shows page 1. Sign up to view the full content.
45. The ruling separation is
d
= 1/(400 mm
–1
) = 2.5
×
10
–3
mm.
Diffraction lines occur at angles
θ
such that
d
sin
=
m
λ
, where
λ
is the wavelength and
m
is an integer. Notice that for a given order, the line associated with a long wavelength
is produced at a greater angle than the line associated with a shorter wavelength. We take
λ
to be the longest wavelength in the visible spectrum (700 nm) and find the greatest
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '08
 Any
 Physics, Diffraction

Click to edit the document details