JEE Main202120 Jul 2021Morning ShiftPhysicsWaves and SoundActual
The amplitude of wave disturbance propagating in the positive x -direction is given by y = 1 ( 1 + x ) 2 at time t = 0 and y = 1 1 + ( x - 2 ) 2 at t = 1   s , where x and y are in metres. The shape of wave does not change during the propagation. The velocity of the wave will be m   s - 1 .
Correct answer
2
Step-by-step solution
At t = 0 , y = 1 1 + x 2 At time t = t , y = 1 1 + ( x - v t ) 2 At t = 1 , y = 1 1 + ( x - v ) 2   … ( i ) At t = 1 , y = 1 1 + ( x - 2 ) 2   … ( ii ) Comparing ( i )   and   ( ii ) v = 2   m   s - 1