## Apparent magnitude of spheres illuminated by the sun as a function of the diameter of the spheres. It is assumed that the distance from the observer to the spheres is 1 meter (Curve A) and 10 meters (Curve B). See equation (1) p. 286.

NCAS EDITORS' NOTE:The photocopies of this figure and Figure 5 did not scan properly, so it was necessary to regenerate the figures from scratch.