Oscillations
and Waves > Standing Waves |
DCS#
3B22.10 |
STANDING WAVES ON
A
STRING
APPARATUS
Pasco driver |
202-17-A3 |
Pasco function
generator/amplifier |
202-17-A3 |
4 m of black nylon string |
202-02-C3 |
50-g weight hanger |
101-05-C1 |
50 g mass |
101-05-C |
hook |
202-01-C5 |
pulley |
202-01-C5 |
DESCRIPTION
- Predict wave speed from tension and
linear density of string: v = √(FT/μ).
- Set driver frequency to obtain
standing waves.
Determine wavelength from distance between nodes. Calculate wave
speed, v = fλ.
Set the frequency so that λ=
L, and there are two loops. Show that quadrupling the weight
doubles
the wavespeed and therefore the wavelength. One fourth the
weight halves the wavelength.
NOTES
Linear
density,
μ = 1.28
g/m for nylon string, 0.272 g/m for Dacron string.