-12. Now the nucleus of sodium has become of appreciable size, and also in the inset the nucleus of the hydrogen atom (a proton) is clearly "visible". As was pointed out in -4, there is no question of the objects themselves being "visible", as we are dealing here with dimensions which are a hundred million times smaller than the wave lengths of light. Light functioned only up to that drawing. So did color, which could play an appreciable role in only 14 domains of scale (#10 to -3); 11 to 26 could give no more than white spots on a black background.

1 cm. in picture = 10^-12 cm. = 0.0001 A.
Scale = 1 million million:1 = 10¹²