Physics wave lab

# Physics wave lab - EXAMPLE OF A WELL WRITTEN LAB REPORT FOR...

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EXAMPLE OF A WELL WRITTEN LAB REPORT FOR PHYSICS 183/184 26 June 2000 STANDING WAVES ON A STRING Harold A. Climer Mark A. Wilson Objective: To find the relationship between the velocity and wave length of standing waves on a string as well as to find the relationship between string tension, velocity and wave length and the number of standing waved formed. Apparatus: 120Hz vibrator, an aluminum rod and 90 o clamp, string, mass hanger, a pulley clamp, various masses, a 2-meterstick, and a triple-beam balance. THEORY: Consider a string fixed at one end and tied to a vibrator. The waves produced by the vibrator travel down the string, are inverted by reflection at the fixed end, and travel back to the vibrator. If the vibrator amplitude is small, it acts essentially as a fixed end as far as reflection is concerned. The condition for constructive interference between the reflected wave and the wave produced from the vibrator is L = n λ /2 , where L is the length of the string and n is any integer. Standing wave A standing wave, also known as a stationary wave, is a wave that remains in a constant position. This phenomenon can occur because the medium is moving in the opposite direction to the wave, or it can arise in a stationary medium as a result of interference between two waves traveling in opposite directions. The sum of two counter-propagating waves (of equal amplitude and frequency) creates a standing wave . Standing waves commonly arise when a boundary blocks further propagation of the wave, thus causing wave reflection, and therefore introducing a counter-propagating wave. For example when a violin string is displaced, longitudinal waves propagate out to where the string is held in place at the bridge and the "nut", where

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Physics wave lab - EXAMPLE OF A WELL WRITTEN LAB REPORT FOR...

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