In sonometer experiment, the string of length $L$ under tension vibrates in second overtone between two bridges. The amplitude of vibration is maximum at

• A

  $\frac{L}{3},\frac{2L}{3},\frac{5L}{6}$
• B

  $\frac{L}{8},\frac{L}{4},\frac{L}{2}$
• C

  $\frac{L}{2},\frac{L}{4},\frac{L}{6}$
• Correct answer
  D

  $\frac{L}{6},\frac{L}{2},\frac{5L}{6}$

Solution

String vibrating in second overtone:

Hence, the correct answer is option: 'D'.