Given the progressive wave equation y = 5 sin (2000 πt – 0.4x), calculate wave length
-
A.
12.4 m -
B.
15.7 m -
C.
17.5 m -
D.
18.6 m
Correct Answer: Option B
Explanation
Comparing y = 5sin (200 πt – 0.4X) with the wave equation y = A sin (wt -KX) K = (2π)/λ = 0.4
∴ λ = (2π)/0.4 = 15.7M