When a #laser hits a soap bubble at the right angle, a dynamic, branch like pattern emerges. No ordinary reflection, refraction or scattering, but splitting and turning of the (still focused) laser beam caused by tiny variations in the thickness of the soap bubble film.
Branched flow of light observed for the first time by Patsyk et al. (), in a simple soap film! It looks like it would even be reasonable to recreate the experiments (and cool light show) at home…
Supplementary Movie 2 below.
Observation of branched flow of light - Nature
Branched flow of light is experimentally observed inside a thin soap membrane, where smooth variations of the membrane thickness transform the light beam into branched filaments of enhanced intensity that keep dividing as the waves propagate.
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