Q) The amplitude of a wave disturbance propagating in the positive x direction is given by y=1/1+x² at t=0 and y=1/2-2x+x² at t=1 sec. where x and y are in meters . Find the velocity of wave propagation.

 

hey is the answer 1m/s ??

if it correct i'll tell u my method

ok . it goes like this .

you can easily see that

 

y = 1/[ (x-t) + 1]^1/2  = f (x - t).....................1

 

now we know that  waves (travelling waves) are always in the form

 

y = f (x/v  - t).................................2

comparing 1 with 2 we get v = 1

rate me !