Do now: Warm up 1/26 Copy Question explain your answer

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Presentation transcript:

Do now: Warm up 1/26 Copy Question explain your answer Stick one medium with another, will the wave transfer over? What do you think will happen to the wave if it traveled from the ?

Wave interaction/interference I sense a disturbance...

Reflection – Bounce back wave Sound waves that are reflected are called echoes Used in sonar and echolocation How wave is reflected depends on if the end if “fixed” or free Opposite wave reflected Same side wave

Refraction The bending of a wave due to the wave moving from one type of medium into another. Caused by change in wave speed through the new medium

Diffraction Wave passing a barrier or going through a hole in a barrier bends causes the wave to wrap around the barrier ex) Hearing music playing but not knowing where it’s coming from or hearing sounds under water

Mediums and changes in mediums A wave is traveling down a medium and hits a boundary. At this point one medium transfers to another

Mediums and changes in mediums the wave travels down medium and hits boundary Boundary is hit and the wave is reflected back and transmitted down the medium The transmitted pulse is upright, the reflected pulse is inverted

How waves interact: AKA interference Constructive Interference : When a wave has the same amplitude position Destructive Interference: When two waves meet and have opposite amplitudes

constructive interference Waves with same amplitude meet Adds together to make a greater amplitude

destructive interference Waves with opposite amplitudes meet Waves meet and create smaller waves Wave keep moving along medium

Standing Waves Standing Waves – the combining of the incoming and reflected wave so that the resultant wave appears to be standing still Node – the point where Constructive Interference and Destructive Interference cause an amplitude of zero on the standing wave (no motion).