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  1. The equation of a sound wave is given as: y = 0.0015 sin (62.4 x + 316 t). The wavelength of this wave is
    1. 0.4 unit
    2. 0.3 unit
    3. 0.2 unit
    4. 0.1 unit
Correct Option: D

y = 0.0015 sin (62.4x + 316t)
On comparing with y = A sin (ωt + kx)
ω = 316, k = 62.4 

⇒ =
2π
 = 62.4 ⇒ λ = 0.1 unit
λ


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