The equation of a travelling wave is
`y=60 cos(1800t-6x)`
where y is in microns, t in seconds and x in metres. The ratio of maximum particle velocity to velocity of wave propagation is
A. ` 3.6 xx10^(-11)`
B. `3.6 xx 10 ^(-6)`
C. `3.6 xx 10^(-4)`
D. `3.6`

The equation of a travelling wave is
`y=60 cos(1800t-6x)`
where y is in microns, t in seconds and x in metres. The ratio of maximum particle velocity to velocity of wave propagation is
A. ` 3.6`
B. ` 3.6xx 10^(-6)`
C. ` 3.6xx 10^(-11)`
D. ` 3.6xx 10^(-4)`