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| Question | Answer |
|---|---|
| what is the combination of two or more waves that result in a single wave? | Interference |
| the change in direction of a wave when it encounters an obstacle | diffraction |
| interference that decreases amplitude | destructive interfernce |
| a pattern of vibration that resembles a stationary wave | standing wave |
| point in a standing wave that has no vibration due to destructive interference | nodes |
| the bouncing back of a wave when it meets a surface or boundary | reflection |
| interference that increases the amplitude | constructive interference |
| sound produced by the interference of sound waves that are used to tune piano strings | beats |
| the bending of waves as they pass from one medium to another at an angle | refraction |
| method of adding crests and troughs if interfering waves together to describe a new wave | principle of superposition |