A wave of angular frequency `omega` propagates so that a certain phase of oscillation moves along x-axis, y-axis, z-axis with speeds `c_(1) c_(2)` and `c_(3)` respectively.

Options

A. `(omega)/(sqrt(c_(1)^(2)+c_(2)^(2)+c_(3)^(2)))(hati+hatj+hatk)`
B. `(omega)/(c_(1))hati+(omega)/(c_(2))hatj+(omega)/(c_(3))hatk`
C. `(omegahati+omegahatj+omegahatk)(1)/(c )`
D. `(omega)/((c_(1)+c_(2)+c_(3)))(hati+hatj+hatk)`

Answer

B

Explanation

`bark=k_(x)hati+k_(y)hatj+k_(2)hatk=(omega)/(c_(1))hati+(omega)/(c_(2))hatj+(omega)/(c_(2))hatk`