1
Figure 3539
Lecture26 Examples
Example Problem1
HW263.
(HRW 3521) In Fig.
3539
, sources A
and B emit longrange radio waves of wavelength
400 m, with the phase of the emission from A
ahead of that from source B by 90°. The distance
r
A
from A to detector D is greater than the
corresponding distance r
B
by 100 m. What is the
phase difference of the waves at D?
Solution:
21. Initially, source
A
leads source
B
by 90°, which is equivalent to
14 wavelength.
However, source
A
also lags behind source
B
since
r
A
is longer than
r
B
by 100 m, which
is
100
1 4
m 400m
=
wavelength. So the net phase difference between
A
and
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 04/21/2008 for the course PHYSIC 2 taught by Professor Kim during the Spring '08 term at Lehigh University .
 Spring '08
 Kim

Click to edit the document details