A string of length L is fixed at one end and perfectly free at the other. Which statements are correct for its natural modes?

Select all that apply

• Option A

  The fixed end is a displacement node.

• Option B

  The free end is a displacement antinode.

• Option C

  The allowed frequencies are odd multiples of the fundamental frequency.

• Option D

  fₙ = (2n-1)v/(4L), where n = 1,2,3,...