Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A sound wave of wavelength 32cm enters the tube as shown in the figure. Then the smallest radius 'r' so that a maximum of sound is heard at detector is - Sarthaks eConnect
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A sound wave of wavelength 32cm enters the tube as shown in the figure. Then the smallest radius 'r' so that a maximum of sound is heard at detector is

A.

7 cm

B.

14 cm

C.

21 cm

D.

28 cm