Timeline for Are sinusoidal travelling waves also normal modes of vibration?
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| Mar 24, 2019 at 17:57 | comment | added | Metric | Tell me if I am wrong, but I think that the reason sinusoidal travelling wave is not a normal mode because the ratio of amplitude of different parts don't remain constant. Like say the ratio between amplitude at two points A and B is say k but as time passes there will be a time when the same ratio is (1/k) or may be some other value which doesn't happen in case of normal modes like standing waves on a string. | |
| Mar 24, 2019 at 17:37 | comment | added | Metric | "That excludes travelling waves, where there is a phase difference between points in the direction of travel of the wave."- but even in a standing wave, which is a normal mode for a string fixed at both ends, there is phase difference between points separated by a node or in two adjacent "loops". Isn't the requirement of a normal mode is that all moving parts have same frequency and not necessarily same phase? | |
| Mar 24, 2019 at 17:26 | history | edited | alephzero | CC BY-SA 4.0 |
added 371 characters in body
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| Mar 24, 2019 at 17:11 | history | answered | alephzero | CC BY-SA 4.0 |