Waves - Result Question 21

21. The equation of a sound wave is given as: y=0.0015sin(62.4x+316t). The wavelength of this wave is

[1996]

(a) 0.4 unit

(b) 0.3 unit

(c) 0.2 unit

(d) 0.1 unit

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Answer:

Correct Answer: 21. (d)

Solution:

  1. (d) y=0.0015sin(62.4x+316t)

On comparing with y=Asin(ωt+kx)

ω=316,k=62.4

k=2πλ=62.4λ=0.1 unit



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