# Wave Superposition 1

Watch the animation. Q1: When the pulses meet, does each continue moving in the direction it was originally moving, or do they reverse direction? (Do the wave pulses bounce off each other or pass through each other?) Q2: What evidence supports your conclusion?
Pause the animation. Use the slider to move time until the moment when the two wave pulses overlap as completely as possible. Q3: Measure the maximum displacement at the instant of perfect overlap. (Assume each grid is 1 cm.) Move the slider so that the two pulses are well separated. Q4: What two measurements could you make and add to get maximum displacement at the instant of perfect overlap? Q5: How could you determine what the displacement would be 1 cm to the left of the peak at the instant of perfect overlap? Q6: Test your answer to Q5. Does it work?  Adjust the time to 1.12 s   Look at the frame just before the moment analyzed above.   Describe the shape of the string.     Explain why the string has the shape it does between the two peaks.       Is your explanation consistent with your explanation of how to determine the displacement of the string above?