Q.

A transverse wave on a string is described by y=3sin(36t+0.018x+π4). Where x, y are in cm and t in seconds. The least distance between the two successive crests in the wave is ______ cm. (Nearest integer)   (π=3.14)                     [2026]


Ans.

(349)

y=3sin(36t+0.018x+π4)

Comparing with the standard equation

y=Asin(ωt±kx+ϕ)

λ=2πk=2×3.140.018=6.280.018

λ=348.9 cm

Nearest integer=349 cm