Hulburt's Fish; RAEF; 2021-04-02
This shows the transmission spectra of Burt's deep blue glass compared with a twilight sky's worth of ozone gas, both of which appear as a rich ultramarine blue with a deep red tint.
E. O Hulburt, was the first to appreciate the importance of the Chappuis band of ozone gas high in the atmosphere in determining the brightness and colour of the twilight sky. See his paper from 1953: "Explanation of the Brightness and Color of the Sky, Particularly the Twilight Sky", E. O. HULBURT, 1953, J. Opt. Soc. America, 43, 2, p113
Hulburt's Fish; RAEF; 2021-04-02
This shows the transmission spectra of Burt's deep blue glass compared with a twilight sky's worth of ozone gas, both of which appear as a rich ultramarine blue with a deep red tint.
E. O Hulburt, was the first to appreciate the importance of the Chappuis band of ozone gas high in the atmosphere in determining the brightness and colour of the twilight sky. See his paper from 1953: "Explanation of the Brightness and Color of the Sky, Particularly the Twilight Sky", E. O. HULBURT, 1953, J. Opt. Soc. America, 43, 2, p113