When dropped into water, water beads becomes invisible. Indeed, their optical index being close to water, no reflexion occur at their surface anymore and they disappear.
video with more explanations (in french) : [ Ссылка ]
see also : [ Ссылка ] (time lapse)
Video by Christophe and Elise FINOT
Music : Chipper - Happy Rock par Kevin MacLeod, Creative Commons Attribution 4.0, [ Ссылка ]
