The tidal wave
Wavelength (L) of tidal wave = 1/2 Earth’s circumference = 20,000 km
Water depth of oceans = 4 km <<< L/2
Tidal wave is a shallow water wave everywhere, i.e. it interacts continually with the ocean bottom
As a shallow water wave, tidal wave feels the bottom, slows, steepens, & sometimes breaks
Tidal wave reflects, refracts, & interferes with other waves or with reflections of itself