5_Interference_FIB0910

# 5_Interference_FIB0910 - (2 If constructive add together...

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1 INTERFERENCE NOTES Use Chapter 25 in the book to complete the following notes questions. Use this information to complete the separate practice problems. The practice problems will be collected as a grade; this sheet will be your notes for the unit. Wave Interference <25.7>: 1. What is wave interference (VOCAB)? 2. Define the two types of wave interferences: Constructive interference: Destructive interference: 3. For constructive interference, the crest of one wave overlaps the _________________ of another wave. For destructive interference, the crest of one wave overlaps the _________________ of another wave. ***NOTE: destructive interference does not necessarily cause a complete cancellation of the waves….just a reduction of some kind! 4. Determining constructive and destructive interference patterns: (1) Mark points where the two waves hit the midline. Mark those points on the new wave.

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Unformatted text preview: (2) If constructive, add together the two amplitudes and mark the new crests and troughs. (3) Sketch the new wave through the points. 2 Example: -4-3-2-1 1 2 3 4 10 20 30 40 50 60 +-4-3-2-1 1 2 3 4 10 20 30 40 50 60 =-4-3-2-1 1 2 3 4 10 20 30 40 50 60 Standing Waves <25.8>: 5. Standing waves (VOCAB) are created using interference patterns between one “shaken” end and one fixed end. 6. The standing wave pattern is found by the wave ___________________ off the wall (or fixed point) and interfering with the next wave sent. 7. Define the two parts of a standing wave: Node (VOCAB): Antinode (VOCAB): 8. Which part of a standing wave could you touch and not affect the waves traveling? 9. There will always be one more node than antinode! As number of antinodes increases, frequency increases! The arrows indicate the nodes....
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## This note was uploaded on 11/13/2011 for the course PHYS 1111 taught by Professor Plascak during the Fall '08 term at UGA.

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5_Interference_FIB0910 - (2 If constructive add together...

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