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  • File:MacCumberViFig1.jpg
    Cross-sections of the new laser medium versus wavelength, reported in series of publications in 2006 (thick curves); ...it compatible with the [[McCumber relation]] and with the [[Second Law of thermodynamics]]
    (857 × 448 (58 KB)) - 07:24, 21 June 2020
  • File:Perpetualmo.jpg
    Curves of the effective emission and absorption cross-section suggested by ...uch a medium suitable material for the [[perpetual motion machine]] of the second kind.
    (766 × 572 (33 KB)) - 09:38, 21 June 2013