It depends on the type of wave (seismic, asteroid, landslide) and how fast it is traveling into the shoreline. It also depends on any reefs or other impedence out in the ocean blocking the waves from reaching the shore.
Having said that, if a 1500 foot tsunami wave approaches the East Coast unimpeded, it could potentially reach Western NY, or maybe even Ohio, or possibly further inland, definitely wiping out the entire Eastern seaboard, including NYC, Boston, Philly, and all other cites in its path.
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Divide the speed by the wavelength. (For any wave, the wavelength times the frequency is equal to the speed of the wave.)
For one thing, I think you should do your own homework. But if a wave is moving 1500m/s and one wave is 1/200th of a second's worth, then the length of that wave is 1500/200 = 15/2 = 7.5 meters.
A wave length of gamma rays is 10 raised to minus 12. Means 1/1,000,000,000,000 meter. It means, you have 1,000,000,000,000, waves of gamma rays in one meter. Wave length of radio wave is 1000 meters. Speed of both of them same. So roughly, you take the speed of radio wave as straight line, forsimplicity of calculation. And straighten the gamma rays it would be minimum 1,000,000,000,000 times the speed of radio wave. ( Here you have taken length of radio wave 1000 times less, it means only 1 meter to correct the effect of straitening it, to be on safer side.) If you know the amplitude ofelectromagneticwave, you can get the unimaginable figure. In threedimensionalspace, wave may be traveling like spring and not as you draw on paper. Probably magnetic wave travel like coating on insulated wire. Which will be perpendicular to 'electric' wave. In that case, it should bechallenging task formathematiciansto calculate the length of such spiral wave.Probably something iscompressing the gamma rays to very small wave, so that speed of electromagnetic wave be a constant. The photons with maximum energy travel as a gamma rays. Then as gradually energy in photon decreases, it's wave length increases. It is a 'spectrum' and for your convenience that you have given them different names. Like gamma rays, x-rays, ultraviolet rays, light rays, infra-red, microwaves and radio waves etc. So better you wait for the edit of this answer by expert in this subject.
The formula for a wave in this case is: speed = frequency x wavelength. Since Hz = 1/second, the answer will be in meter/second.
y • x hertz