Semi-random scattering of light

What is the exact path of light inside a highly scattering material like white paint? This is a question that is impossible to answer, as the particles inside the paint are distributed randomly. This, at the same time, is a very attractive property for applying photonics in non-hackable security applications. Still, you would like to have a look inside to see what is happening. For this reason, researchers of the University of Twente (MESA+ Institute), built a light-scattering microcube that is ...