Light reflection from rough spheres being large compared to the incident wavelength is considered—the resulting reflection pattern is identical to that one produced by randomly oriented convex particles. Only the limiting case of short wavelengths is treated; that means the laws of geometrical optics are assumed to be valid. It turns out that the decisive quantity is the probability distributionP(&bgr;) of the directions of the surface normal vectors. The resulting differential cross section shows the following behavior: with growing roughness the cross section flattens for moderate scattering angles, whereas a rise occurs in the region of backscattering. The resulting formula can be inverted: from the measured cross section the probability distributionP(&bgr;) can be calculated by means of an integral transformation.