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1:黃福坤(研究所)張貼:2004-02-01 17:31:00:

## 海浪的波形

拖動滑鼠時 將會畫出一個方塊。
此方塊的高度將決定 浪高，寬度將決定波長。

按滑鼠右鍵 可暫停動畫，再按一次則繼續。

x= x0 + r * cos (phi)
y= y0 + r * sin (phi)

phi= 2π/λ+ 2π/ T
λ為波長 T 為週期 r 為振幅。

2:紀延平榮譽點數17點 (研究所)張貼:2006-11-16 16:30:36: [回應上一篇]

http://www.kettering.edu/~drussell/Demos/waves/wavemotion.html

3:黃福坤 (研究所)張貼:2006-11-16 20:14:29: [回應上一篇]

## Water Waves

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases. The movie below shows a water wave travelling from left to right in a region where the depth of the water is greater than the wavelength of the waves. I have identified two particles in blue to show that each particle indeed travels in a clockwise circle as the wave passes.

## Rayleigh surface waves

Another example of waves with both longitudinal and transverse motion may be found in solids as Rayleigh surface waves. The particles in a solid, through which a Rayleigh surface wave passes, move in elliptical paths, with the major axis of the ellipse perpendicular to the surface of the solid. As the depth into the solid increases the "width" of the elliptical path decreases. Rayleigh waves are different from water waves in one important way. In a water wave all particles travel in clockwise circles. However, in a Rayleigh surface wave, particles at the surface trace out a counter-clockwise ellipse, while particles at a depth of more than 1/5th of a wavelength trace out clockwise ellispes. The movie below shows a Rayleigh wave travelling from left to right along the surface of a solid. I have identified two particles in blue to illustrate the counterclockwise-clockwise motion as a function of depth.

Rayleigh表面波粒子的軌跡則是橢圓 其中一個半長軸也一樣隨深度不同而遞減.

4:黃福坤(研究所)張貼:2006-11-16 21:59:29: [回應上一篇]

5:黃福坤 (研究所)張貼:2006-11-16 22:03:44: [回應上一篇]

6:紀延平榮譽點數17點(研究所)張貼:2006-12-14 15:48:39: [回應上一篇]

http://hyperphysics.phy-astr.gsu.edu/hbase/waves/watwav2.html

http://en.wikipedia.org/wiki/Ocean_surface_wave

http://www4.ncsu.edu/eos/users/c/ceknowle/public/chapter10/part1.html

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