They grow as hollow spheres within a complex gel - like substance filled with growth - inducing factors and connecting fibers. (sciencedaily.com)
The steel - CMF, on the other hand, absorbs the energy of the blast wave and flying fragments through local deformation of hollow spheres, leaving the steel - CMF armor under considerably less stress — offering more protection against fragments and blast waves. (sciencedaily.com)
Tiny hollow spheres of photovoltaic material trap and loop light the same way a whispering gallery does to sound, letting solar cells absorb more light. (treehugger.com)