I’ve talked in some detail before about the Kaye effect, in which a shear-thinning fluid such as shampoo or liquid soap can be made to “bounce.”  Well, I did one final experiment with the Kaye effect, in order to show that the shampoo can be used as a light guide, as was demonstrated in 2006 by a Dutch research group.

My video result is posted below: nearly 3 glorious minutes of a cascading stream of shampoo with light glowing from within!  I was never able to get a truly stable Kaye stream, but the effect is almost more fun with the stream erratically bouncing.