Waves Interference (PDF)

Waves Interference Review Today’s Key Terms Constructive Interference Destructive Interference Super Crest/Trough Superposition Noise Cancelling Rogue Waves Tsunamis Interference When two waves meet, they will always “interfere” with each other. Constructive Interference – Super...

Waves Interference Review Today’s Key Terms Constructive Interference Destructive Interference Super Crest/Trough Superposition Noise Cancelling Rogue Waves Tsunamis Interference When two waves meet, they will always “interfere” with each other. Constructive Interference – Super Crest – Super Trough Destructive Interference – Node Two identical waves collide Adding Waves Example 1 Two waveforms are about to interfere with each other. Which is the correct resultant waveform. Example 1 Solution Two waveforms are about to interfere with each other. Which is the correct resultant waveform. Example 2 Two waveforms are about to interfere with each other. Draw the resultant waveform. Example 2 Solution Try These 1. 2. Try This Create different wave shapes and see how they interact constructively and destructively. Try This In this simulation, see if you can predict what the interference will look like. Then show the pulse sum to check your answer. Rogue Ocean Waves Noise Cancelling Headphones 4. Original (unwanted) sound 1. Incoming (unwanted) sound and newly added sound (e.g. plane, train, bus) (cancel each other out) 2. Sound picked up by microphone 3. Noise cancelling inverts wave (sent to noise cancelling circuitry) (sends it back into speaker) Review Today’s Key Terms Constructive Interference Destructive Interference Super Crest/Trough Superposition Noise Cancelling Rogue Waves Tsunamis