A progressive wave is, `y= 12 sin (5t - 4x)`. On this wave how far away are the two points having a phase difference of `45^@)` ?

Options

A. `pi//4`
B. `pi//8`
C. `pi//16`
D. `pi//32`

Answer

C

Explanation

`delta = (2pix)/(lamda)` here k = 4
`:. (2pi)/(lamda) = 4 " " :. lamda = (pi)/(4)`
`:. x = (delta lamda)/(2pi) = ((pi)/(4) xx (pi)/(2))/(2pi) = (pi)/(16)`