Discussion
The wavelength of Tsunami is in the range of :
Answer: A
The wavelength of a tsunami is a few kilometers up to a few hundreds of kilometers.
A tsunami is generated when an earthquake, landslide or eruption displaces a whole column of seawater. In the open ocean its wavelength is commonly 100-500 km and its period 10 minutes to an hour, while its height may be under a metre, which is why ships at sea hardly notice it. It slows and grows in height as it reaches shallow water.
Wavelengths of metres to tens of metres, or up to one kilometre, belong to ordinary wind waves and swell, whose periods are only seconds. Those ranges are far too short for a tsunami.
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