HW 8 Solutions

HW 8 Solutions - HW
#
8
Solutions
...

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Unformatted text preview: HW
#
8
Solutions
 Conceptual
Questions
 1.
 Δy ∝ λL d € (a)
Decreases;
(b)
Decrease;
(c)
Increases
 2.
Nothing
happens
in
the
central
band
(m=0).
Colors
spread
in
 the
remaining
bands
with
red
on
the
outside
and
blue
and
violet
 on
the
inside.
(see
Fig.
22.8)
 3.
Two
reasons.
First
the
sources
are
not
coherent
since
each
 headlight
generates
its
own
random
phase.
(Reason
for
using
 the
same
source
and
splitting
it
in
two
slit
experiments.
Second,
 even
if
we
had
coherent
sources
since Δy=λL/d
and
λ/d
is
less
 than
10‐7
the
only
way
to
see
a
pattern
will
be
to
go
at
least
105
 meters
away.
 4.
w∞1/D
it
decreases
 5.
Iw=const.
,
I∞D
it
decreases
 6.
No.
For
N
slits
the
intensity
is
N2
that
of
a
single
slit.
For
two
it
 is
four
times
larger.
Coherent
addition.
 7.
 8.1
Solution
 8.2
Solution
 8.3
Solution
 8.4
Solution
 ...
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