• What is the principle of superposition?
• What do in phase waves cause and how do they occur? (3 points)
• Draw a diagram of a wave in constructive interference.
• What do anti-phase waves cause and how do they occur? (3 points)
• Draw a diagram of a wave in destructive interference.
• To what type of waves does the principle of superposition apply to?

Question

• Answer
• When are stationary waves produced?
• How are stationary waves usually achieved?