A sound wave of wavelength 32 cm enters the tube at S as shown in the figure. Then the smallest radius r so that a minimum of sound is heard at detector D is

A sound wave of wavelength 0.40 m enters the tube at S . The smallest radius r of the circular segment to hear minimum at detector D must be

A sound wave of wavelength 0.40 m enters the tube at S . The smallest radius r of the circular segment to hear minimum at detector D must be

A sound wave of wavelength 0.40 m enters the tube at S . The smallest radius r of the circular segment to hear minimum at detector D must be

A sound source emits two sinusoidal sound waves, both of wavelength lambda , along paths A and B as shown in figure.The sound travelling along path B is reflected from five surfaces as shown and then merges at point Q, producing minimum intensity at that point.The minimum value of d in terms of lambda is :

A sound source emits two sinusoidal sound waves, both of wavelength lambda , along paths A and B as shown in figure.The sound travelling along path B is reflected from five surfaces as shown and then merges at point Q, producing minimum intensity at that point.The minimum value of d in terms of lambda is :