User talk:77.161.196.241

Remark about the imaging geometry and Fig. 3.11: If h2=0, then m=1, then p =0. This means no penumbra at all. So the statement "Since the size of the penumbra, p, is nevertheless greater than the focal spot size to an extent dependent on the magnification" is not always true. Kakapoe3010 (discuss • contribs) 21:44, 28 June 2011 (UTC)