II. Standing Wave - One end open, other end closed A. This standing wave is caused by reflection
B. There is always a NODE on the closed end and an ANTINODE on the open end
1. 1st Harmonic (Fundamental) (N.A.) N.A. = (Node - Antinode) L = Standing Wave Length
2. 3rd Harmonic (NA NA) L = Standing Wave Length
3. 5th Harmonic (NA NA NA) L = Standing Wave Length
4. 7th Harmonic (NA NA NA NA)
L (Standing Wave Length) = 7/4 l
l = (4/7)L L= [n/4]l n = 1, 3, 5, 7 ..... since v = fl then fn = nv/4L n = 1,3,5,7 .....
If fundamental is 20 Hz
Then a standing wave can be produced at
D. Open at Both Ends
1/2, 2/2, 3/2, 4/2 since v = fl since v/l = f
then fn = nv/2L n = 1,2,3,4 .....
Beats - Rhythmic interference between two semi identical frequency sources
Beat Frequency = |f1 - f2|
Enrichment
Standing Waves - Wake Forest .U.
Large_Free_Sphere_of_Water.mov
)
ŠTony Mangiacapre.,
- All Rights Reserved [Home]
|
|||||||||||||||||