Example of Stationary Waves

Sound in a Pipe:Sound resonates at certain frequencies in an air filled tube or pipe.The resonant frequencies occur when there is an antinode at the open end and a node at the closed end. If the pipe is open at both ends there are antinodes at the open end and nodes at half-wavelengths within the pipe.MicrowavesWhen a detector is moved between a microwave transmitter and a metal plate the minimum (zero) signal is at equal intervals.