Vibrations
Sound needs a medium to travel through to be heard. It occilates through the medium and makes it vibrate. Every object has its own frequency, or a rate of vibration that the object tends to occilate to. When sound waves travel through the air and reach a new medium with the same frequency, it makes the second object vibrate which is an example of resonance.
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Resonance
Resonance between objects with the same
frequency increases the amplitude of the vibrations. A great example of this is when opera singers reach notes of such a high pitch, that they match the frequencies of glass and they shatter. Sound waves can do so many extraordinary things it's almost unbelieveable. Here is a video demonstrating just how powerful sound is. www.youtube.com/watch?v=17tqXgvCN0E |