Standing Waves School blocks YouTube? Download the file below.
Kieff, Ptj, Wikipedia, public domain
St. Mary's Physics Online
B) Standing Wave – waves produced when two waves of the same frequency and amplitude travel in opposite directions in the same medium (Musical instruments)
School blocks YouTube? Download the file below. Remember the old slinky song? - slinky.wav
Standing Wave
School blocks YouTube? Download the file below. Mythbusters from YouTube
Standing Waves - Chladni Plates
School blocks YouTube? Download the file below.
How many antinodes are in each picture? (focus on the lower half of the guitar)
Physics of the
Acoustic Guitar
2, 4, 10
Click on the frequencies above | Larger |
Standing waves can also be produced by reflection
How many nodes?
5
How many antinodes?
4
How many waves?
2
C. K. Eng
How many wavelengths?
Wikipedia, Houtlijm, public domain
| Larger |
Illustration of
vibrations
of a drum -
Oleg Alexandrov
2 antinodes, wavelength = 3.0 m
AP Physics
L = distance between walls String fixed at both ends L = (nl/2) n = 1,2,3 .... since v=fl then fn = n[v/2L]
n = 1,2,3 .... Each frequency is a multiple of the fundamental frequency Pipe Open at One End
Closed at one end
L= [n/4]l n = 1,3,5,7 ..... since v=fl then fn = nv/4L n = 1,3,5,7 ..... frequency goes up by 2 times fundamental and are divisible by ODD number
Giancoli p. 348) 34, 36
34) Closed 88 Hz is fundamental 36) Open Pipe Fundamental 40 Hz, both are even number multiples of 40 not odd multiple of 20
f = v/2L = 40 Hz = (340 m/s)/2L L = 4.3 m
Review Book p. 302) 10.
Open at one end n = 1 fundamental f = v/4L = 340 m/s/(4 x .17) = 500 Hz
p. 303) 10
Beats - Rhythmic interference between two semi indentical frequency sources
Enrichment
Enrichment
Standing
Waves/Sound/Chladni
Standing Waves - Wake Forest .U. (Chladni Disk)
Water Drop in Zero g School blocks YouTube? Download the file below. Waves_in_a_Large_Free_Sphere_of_Water.mov
Standing Waves
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