Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the left. Both pulses reach point X at the same instant.
Answer
A
No, the interfering waves will always be above X.
B
No, the interfering waves will always fall below X.
C
Yes, the overlap will occur during the slope of the waves.
D
Yes, the overlap will occur when the first wave hits point X.