Standing Waves

The purpose of this lab is to observe the generation of standing waves from a finite length of string and to identify the patterns of frequency, loops, nodes and wavelengths for each harmonic.

The Setup:

• A length of string is stretched taught with one end tied to a hanging mass, and the other at a fixed height bound  to a clamp
• A wave driver is placed under the fixed end of the string
• A function generator is connected to the wave driver to run at various frequencies to establish standing waves of various wavelengths

A wave driver, attached to a fixed string oscillates at a set frequency

A standing wave with a frequency setting of 16.5 is visible

Measurements and Calculations:

Beginning with a low frequency, we located the fundamental standing wave in which the entire length of the string established a half-wavelength standing wave.  Subsequent normal modes were located as the frequency of the wave driver increased.

Hamed (right) is excited about our results!