Transmission, Reflection and Interference

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Presentation transcript:

Transmission, Reflection and Interference Wave behavior Waves in different mediums Sound waves in space The effect of weather Partial wave reflection Free and Fixed ends Interference of waves Destructive and Constructive Interference Interference addition

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Wave Behavior If the medium the wave travels through stays constant, the waves will travel at a uniform speed Waves act differently as they pass through different mediums and encounter various conditions ___________

Sound Behavior in Different Mediums Sound waves are transmitted from particle to particle through vibrations _________ Therefore sound travels faster in solids then in liquids liquids compared to gases ………………… Medium Sound Wave Speed Air (20°C) 343 m/s Water (20°C) 1,482 m/s Steel (20°C) 5,960 m/s

Try It Tap your desk with your knuckles and listen to the sound it makes. Tap your ………………. Which is louder? Why?

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In Space Space has very few particles all of which are very, very far apart Since the particles cannot vibrate against each other, __________ See how videos are embedded into your lesson. In slideshow mode, click the video image and your video will automatically open in your browser.

Sound Behavior Under Different Weather Conditions __________ Hot particles (hot air, hot water, etc.) transmit sound waves better than cold particles The particles vibrate quickly and easily Medium Sound Wave Speed Air (0°C) 331 m/s Air (20°C) 343 m/s Water (0°C) 1417 m/s Water (20°C) 1,482 m/s

Partial Reflection at the Boundary When a wave is transmitted across the boundary between two different mediums, some of the energy is reflected back __________

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Wave Reflection Off A Boundary This reflection is very apparent in regards to how sound is perceived and used Some animals, as well as ……………. Sonar is the same principle Sound waves are bounced off various objects such as prey, land formations, etc. _________

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Wave Behavior – Fixed and Free Ends __________ Pulses reflected off a free end will not invert

Interference of Waves Interference is what occurs when two waves meet There are two kinds Destructive Interference Constructive Interference

Destructive Interference Occurs when a crest meets a trough Occurs at the node ________ Once the waves pass, they resume their original amplitude

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Interference __________ If the waves are continuous, the interference will continue

Interference Addition The result of the interference is additive If a +1 crest meets a -1 trough, the result will be 0 or ………….. If a +2 crest meets a -1 trough, the result will be +1 or partial destructive interference _________

Check Your Understanding Being as accurate as you can, draw what occurs when a crest of +1 meets a crest of +1 a trough of -2 meets a crest of +3 a crest of +2 meets a crest of +1

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