Question

In the wave equation y=a sin(wt-kx), y is displacement, a is amplitude , x is distance and t is time. Then dimensional formula of k is

Answer 1

Answer:

$m^{-1}$

Explanation:

anything in a sin function is dimensionless

wt - kx is dimensionless

kx is dimensionless

k is $m^{-1}$

Answer 2

Answer:

m^-1

Explanation:

anything in a sin function is dimensionless

wt - kx is dimensionless

kx is dimensionless

k is m^-1