Consider the case of normal modes of vibration for the air column with only one end closed. What is the length of the air column for the fundamental harmonic?(a) λ/2(b) λ(c) 2λ(d) λ/4
Right answer is (d) λ/4The best I can explain: For the given condition wavelength is related to length by: λ = 4L/(2n+1).∴ For fundamental harmonic n=0, & L = (2n+1)λ/4= (0 + 1)λ/4= λ/4.