1.

Phase difference between two waves y _(1) = A sin (omega t - kx) and y _(2)= A cos (omega t - kx)is ……

Answer»

`pi/4`
`pi`
`pi/8`
`pi/2`

SOLUTION :`y _(1)=A sin (omega t - kx )`
` y _(2) = A cos (omega t - kx )`
`therefore y _(2) = A sin ((pi)/(2) + omega t - kx)`
`(because cos THETA = sin ((pi )/(2) + theta ))`
Phase difference `= ((pi)/(2) + omega t - kx) - (omega t - kx)` br> `= (pi)/(2) + omega t - kx - omega t + kx`
`=(pi)/(2) RAD`


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