A cylindrical pipe of length 40 cm closed at one end is found to be at resonance when a tuning fork of frequency 512 Hz is sounded near the open end of the pipe. Take velocity of sound in air a s 340 ms-1.
(iii) Diameter of the pipe using Rayleigh criterion will be
7.2 cm
7.4 cm
7.6 cm
7.8 cm