The phrase "spherical particles" refers to tiny things or objects that are round, like a ball or a sphere.
Sentences with «spherical particles»
Mishchenko, M.I., and A.A. Lacis, 2003: Morphology - dependent resonances of nearly spherical particles in random orientation. (pubs.giss.nasa.gov)
Mishchenko, M.I., and A. Macke, 1997: Asymmetry parameters of the phase function for isolated and densely packed spherical particles with multiple internal inclusions in the geometric optics limit. (pubs.giss.nasa.gov)
Hansen responded to growing claims of his involvement by admitting his involvement: «It was a «Mie scattering» code I had written to calculate light scattering by spherical particles. (leftexposed.org)