MHTCET 2016 Physics Solved Paper

(c) We have given y = 12 sin (5t- 4x) cm
Comparing this equation with standard equation of progressive wave, y = A sin (ωt - kx)
we get A = 12
ω = 5
⇒ k = 4
Here, (ωt - kx) is phase difference =

π

2

∴ 5t - 4x =

π

2

‌‌‌ When t = 0 ,4x =

π

2

∴ x =

π

8

cm