When sunlight hits small waves or ripples on the water’s surface, the curved water acts as a set of moving, variable lenses. Sunlight is focused into narrow, high-intensity sheets or “caustics” (the dancing light patterns you see on the bottom of a swimming pool). These concentrated sheets of light function just like the focused beam of a slit lamp as they slice through the water column.
I'm thinking that ripples in the water are more like curved lenses and not much like slits.
The Grateful Dead’s “Ripple” became a kind of cosmic spiritual after its debut 50 years ago. Since then, the universal appeal of Robert Hunter’s serene prose...
Duh. Of course ripples are not slits, but they both produce caustics. The caustics which enhance visibility of the Tyndall scattering work in the same way in both cases.
Tom, I think you have not grasped a “slice of light or a caustic” as being the same, regardless of method of light occlusion. Tyndall scattering is the key here.
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tom grzybow
•When sunlight hits small waves or ripples on the water’s surface, the curved water acts as a set of moving, variable lenses. Sunlight is focused into narrow, high-intensity sheets or “caustics” (the dancing light patterns you see on the bottom of a swimming pool). These concentrated sheets of light function just like the focused beam of a slit lamp as they slice through the water column.
I'm thinking that ripples in the water are more like curved lenses and not much like slits.
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Michael Fenichel
•Grateful Dead - Ripple (Official Music Video)
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•"Where there is no pebble tossed, nor breeze to blow..."
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Brian Fitzgerald
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