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Standing Waves in Air Columns is demonstrated. Nodes and antinodes are excited by a tuning fork for pipes that are open-open and open-closed. A classic demonstration of the Rayleigh's Criteria (widely used in studying combustion stability in aircraft, rocket and gas turbine engines) is demonstrated using a heated wire gauze placed inside a pipe at a suitable location inside the tube. This is called the Rijke Tube experiment.
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