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- Path: sparky!uunet!zephyr.ens.tek.com!uw-beaver!news.u.washington.edu!milton.u.washington.edu!whit
- From: whit@milton.u.washington.edu (John Whitmore)
- Newsgroups: sci.physics
- Subject: Re: sea waves
- Keywords: waves
- Message-ID: <1992Aug19.033351.5471@u.washington.edu>
- Date: 19 Aug 92 03:33:51 GMT
- References: <boudouvi.714144870@theseas>
- Sender: news@u.washington.edu (USENET News System)
- Organization: University of Washington, Seattle
- Lines: 13
-
- In article <boudouvi.714144870@theseas> boudouvi@ntua.gr (Andreas Boudouvis) writes:
-
- >Why the crests of sea waves are white (esop. when the waves
- >break at the seashore?)
-
- Waves in shallow water are dispersive (also wind-driven waves),
- in the sense that the crest of the wave travels faster than the base
- of the wave. The crest then travels out from over its support,
- and falls-down-goes-boom. This is the reason for whitecaps that
- I've always been told; it is consistent with the shallow-water wave
- equation (but I haven't run the exact numbers).
-
- John Whitmore
-