n of the violet ; the eye sees, as it RED YEL. GREEN BLUE VIOLET Fig. 22. — Spectrum of green glass. were, the mean of these colours, therefore we say the glass is orange-yellow. Fig. 22 shows the absorption spectrum of a piece of green glass. In this case the glass materially reduces the intensity… … Fio. 23. — Spectrum of blue gla&s. side and violet on the other. It will be noticed that the ^^lass permits the violet rays (but with diminished intensity) up to the H line to pass, while it stops all the red. In Fig. 23 is shown the spectrum of a blue glass. This is much more complex in character…
Color
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
