The fireside university of modern invention, discovery, industry and art for home circle study and entertainment . t£Sl£lBearn RED ORANGE *-Oyy Fig. 74. OBTAINING A SPECTRUM. and, falling several degrees, will become a u long spot with roundends that is, the disk will be stretched out. But this is not top of the spot will be red, the middle yellow, the bottomblue, with all the shades and tints interspersed between. It wasfound, forty years before the X Rays, that just above the redend (in the dark) bodies could be heated, and just below the blueend (also in the dark) bodies could be ch
The fireside university of modern invention, discovery, industry and art for home circle study and entertainment . t£Sl£lBearn RED ORANGE *-Oyy Fig. 74. OBTAINING A SPECTRUM. and, falling several degrees, will become a u long spot with roundends that is, the disk will be stretched out. But this is not top of the spot will be red, the middle yellow, the bottomblue, with all the shades and tints interspersed between. It wasfound, forty years before the X Rays, that just above the redend (in the dark) bodies could be heated, and just below the blueend (also in the dark) bodies could be chemically affected, so thatthere were X Rays even in those days. But these outside and non-luminous rays were not X Rays like those which Doctor Roent-gen discovered in 1895. (See X Rays.) The long spot on the. Fig. 75. PRINCIPLE OF THE SPECTROSCOPE.(a.) Prism, (b.) Tube through which the light passes, (cj Eye-piece, (d.) Scale. THE SPECTROSCOPE, 215 wall is the suns Spectrum. Two such spots would be Spectra(plural). Study of this spot is Spectral Analysis. Newton beganthe investigations. What did the scientists think about the long spot ? They concluded that the prism had made a long row of spotson the wall, each overlapping the other. So they began experi-menting with knife-cuts or slits in the window curtain, to see ifthey could not get also a row of slit-like bright places on thewall. But these experiments only demonstrated that light wentthrough the prism in every degree of refrangibility, and that thedivisions of color we make with our eye are only illusory, or atleast rude.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
