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four choices have been provided. Select the correct alternative. In a resonating air column method, the first and second resonating lengths of the air columns are 16  cm and 48  cm, respectively. If the frequency of a tuning fork used is 500  Hz, arrange the following steps in a sequential order to find the velocity of sound in air.
(A) Find the first and second resonating lengths of the air columns and frequency of the tuning fork from the given problem.
(B) The difference of lengths of two resonating air columns is, ℓ_2-ℓ_1=λ / 2 and λ=2(ℓ_2. - ℓ_1 ).
(C) Find the first and second resonating lengths ' ℓ_1 ' and ' ℓ_2 ' in terms of ' λ ', i.e., ℓ_1=λ/4 and ℓ_2=3 λ / 4.
(D) The velocity of sound, V=n λ=2 n(ℓ_2-. .ℓ_1). Substitute the corresponding values and obtain the value of ' V.
(a) ACBD
(b) ABCD
(c) DCBA

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