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Homework Statement
Surface waves generated by a mid-Atlantic storm arrive at the British coast with period 15 seconds. A day later the period of the waves has dropped to 12.5 seconds. Roughly how far away did the storm occur?
Homework Equations
Group velocity c = \frac{\omega}{2k}
\omega = (gk)^{1/2}
T = \frac{2 \pi}{\omega}
The Attempt at a Solution
First problem is...
Group velocity is proportional to 1/T so why are the longer periods arriving first? Shouldn't they move slower and thus arrive after the smaller period waves.
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