Ocean waves keep the same frequency all the way to the shore, because the wind far out at sea set it. In deep water their speed depends on wavelength, not depth, but once the water is shallower than about half a wavelength the sea floor slows them, and in shallow water v = √(gd). Since v = fλ with f fixed, slower waves also have shorter wavelengths, so crests bunch up, steepen and break over shallow ground. Coastal Aboriginal Peoples read these changes in wave speed and spacing to judge water depth and find reefs, sandbars and channels. This is the real knowscape from knowhere, not a picture of one. Drag it. Watch what actually changes.
A wave carries energy, not stuff: each bit of the medium oscillates in place while the pattern moves on at v = fλ (light needs no medium). Everything else here is that pattern meeting something: a new medium bends it, a gap spreads it, a second wave adds to it, a moving source squashes it.
Two drips fall side by side, about to hit the still water.
They land and rings spread out from each one, getting fainter as they grow.
Where rings cross they stack or cancel, then pass through each other unchanged.
knowhere maps every concept to what it rests on and what rests on it — 2 underneath this one, 0 built on top. Each one says why, in a sentence, not as an arrow on a diagram.
Each one is its own knowscape in the app — built for how a particular student takes things in, not one explanation handed to everybody.
Every HSC and VCE concept in knowhere is built like this one — mapped to your curriculum, never capped by it. Free for a week. No lock-in, cancel inside the week and pay nothing.
Free for a week, then a plan you can stop any time.
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