Question

Two wave pulses travel in opposite directions on a string and approach each other. The shape of the one pulse is the invert with respect to the other, then

• A. the pulses will collide with each other and vanish after collision
• B. the pulses will reflect from each other i.e. the pulse going towards right will finally move towards left and vice versa
• C. the pulses will pass through each other but their shapes will be modified
• D. the pulses will pass through each other without any change in their shape

Answer 1

The correct option is D the pulses will pass through each other without any change in their shape

As the two wave pulses approach each other on the same string, they do not affect the shape of one another and will pass as they are invert of each other.

when the wave pulses overlap the wave function is the sum of individual wave functions. AT the point where two waves pulses meet, net displacement will be zero.

Option $D$ is correct.