MEASUREMENT OF SPEED OF SOUND IN AIR.

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Presentation transcript:

MEASUREMENT OF SPEED OF SOUND IN AIR

OBJECTIVE To measure the speed of sound in air using the resonance column.

THEORY c = fλ c = 4f(λ + 0.3d). c = VELOCITY OF SOUND IN AIR d = DIAMETER OF THE RESONANCE TUBE = 0.035m f = FREQUENCY λ = WAVELENGTH

TOOLS Resonance column Tuning forks Rubber hammer water

RESONANCE TUBE RUBBER HAMMER

TUNING FORKS

STEPS Fill water in the resonance column. Select a tuning fork of known frequency. Beat the tuning fork with a rubber hammer so that it vibrates. Hold the tuning fork to the mouth of the resonance column. Lower the water level by lowering the water reservoir on the side of the tube. 6. Observe carefully for maximum resonance to occur. 7. Note the length where maximum resonance (maximum sound ) is produced . 8. This is the wavelength λ.

DATA c = 4f (λ + 0.3d) FREQUENCY (f) Hz WAVELENGTH( λ) m SOU ND VELOCITY (c ) m/s 256 288 320 c = 4f (λ + 0.3d)

CONCLUSION Velocity of sound in air is = ______________ m/s.