44) A long spring is attached to a wall. A student generates a pulse 20cm high. When the pulse hits the wall it bounces back upside-down. If a student creates another 20cm pulse, what will be the effect when the two pulse meet?
You can think of the upside down (returning) pulse as negative (-20cm) and the new pulse as positive (+20). All waves traveling along the spring will add to each other at each point they meet. What will happen when you add these two numbers?
