This preview shows page 1. Sign up to view the full content.
Wave Optics
325
24.44
When light of wavelength
λ
passes through a single slit of width
a
, the first minimum is
observed at angle
θ
where
sin
a
=
or
1
sin
a
=
a
−
This will have no solution if
<
, so the maximum slit width if no minima are to be
seen is
632
nm
a
==
.8
.
24.45
(a) From Brewster’s law, the index of refraction is
()
2
tan
tan 48.0
1.11
p
n
°
=
(b) From Snell’s law,
22
1
sin
sin
nn
1
=
, we obtain when
1
p
=
( )
1
2
si
sin48.0
sin
42.0
1.11
n
n
°
11
2
n
1.00
sin
p
−−
1
=
°
Note that when
p
=
2
90.0
,
p
=
°−
as it should.
24.46
Unpolarized light incident on a polarizer contains electric field vectors at all angles to
the transmission axis of the polarizer. Malus’s law then gives the intensity of the
transmitted light as
( )
2
0
av
cos
II
=
. Since the average value of
2
cos
is
12,
the
intensity of the light passed by the first polarizer is
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.
 Fall '10
 STAFF
 Physics, Light

Click to edit the document details