Two source interference

1
Two source interference
constructive interference -------
destructive interference -------
2
Two source interference
S1P
S2P
Path difference
1 wavelength
?
P
constructive interference ------- destructive
interference -------
S2
S1
3
Two source interference
n ?
Path difference for constructive interference
(where n is an integer)
0
?
2 ?
3?
constructive interference ------- destructive
interference -------
4
Two source interference
(n ½) ?
Path difference for destructive interference
(where n is an integer)
½?
1½ ?
2½ ?
constructive interference ------- destructive
interference -------
Free powerpoints at http//www.worldofteaching.com
5
Two source interference
The path difference is

• n? for constructive interference

• (n ½) ? for destructive interference

6
This powerpoint was kindly donated to
www.worldofteaching.com http//www.worldofteac
hing.com is home to over a thousand powerpoints
submitted by teachers. This is a completely free
site and requires no registration. Please visit
and I hope it will help in your teaching.