Two separated sources emit sinusoidal travelling waves but have the same wavelength `lambda`
Channel: Doubtnut
Date: 2020-07-26

Two separated sources emit sinusoidal travelling waves but have the same wavelength `lambda` and are in phase at their respective sources . One travels a distance `l_(1)` to get to the observeration point while the other travels a distance `l_(2)` . The amplitude is minimum at the observation point , `l_(1) - l_(2)` is an