“…The spectral location of these transitions is, however, not fully known. Some authors suggest their appearance at 300 nm, 370 nm or 480 nm (Song 1971;Harders, Förster, Voelter& Bacher, 1974, Drabent,1979. The location of transition moments in absorption and the angle between them has also been investigated and determined among others by Johanssson et al (Johansson, Davidson, Lindblom & Naqvi; and Eaton et al (Eaton, Hofrichter, Makinen, Andersen & Ludwig, 1975 Heelis (1982), Drabent (1977) and Grajek (2007).…”