![]() Caution: do not touch the tube with the tuning fork - the rapidly moving fork can break the plastic.Ģ. Strike one of the tuning forks with the rubber mallet supplied and hold it above the water column. ![]() This end correction may be added to get a more accurate value if only one resonance can be measured, but it is usually more convenient to eliminate this "end effect" by subtracting the resonance length for λ/4 from those for 3 λ /4, 5λ /4, etc.ġ. The open end provides the conditions for an antinode, but the actual antinode has been found to occur outside the tube at a distance of about 0.6 r from the end, where r is the tube radius. ![]() The water surface constitutes a node of the standing wave since the air is not free to move longitudinally. The resonance is a standing wave phenomenon in the air column and occurs when the column length is: λ/4, 3λ/4, 5λ /4 Resonance is indicated by the sudden increase in the intensity of the sound when the column is adjusted to the proper length. The length of the water column may be changed by raising or lowering the water level while the tuning fork is held over the open end of the tube. The apparatus for the experiment consists of a long cylindrical plastic tube attached to a water reservoir. The wavelength of the sound will be determined by making use of the resonance of an air column. In this experiment the velocity of sound in air is to be found by using tuning forks of known frequency. The relationship between these quantities is: v = fλ where Introduction: The velocity with which sound travels in any medium may be determined if the frequency and the wavelength are known. To use the resonance to determine the velocity of sound in air at ordinary temperatures. Object: To observe the resonance phenomenon in an open ended cylindrical tube. Resonance Tube: Velocity of Sound Resonance Tube: Velocity of Sound
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