Spectrum analysis in its application to terrestrial substances, and the physical constitution of the heavenly bodies / Familiarly explained by the late H. Schellen. Trans. from the 3d enl. and revised German edition by Jane and Caroline Lassell.

  • Schellen, H. (Heinrich), 1818-1884.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Spectrum analysis in its application to terrestrial substances, and the physical constitution of the heavenly bodies / Familiarly explained by the late H. Schellen. Trans. from the 3d enl. and revised German edition by Jane and Caroline Lassell. Source: Wellcome Collection.

    66/712 (page 36)
    Angle of Incidence in the Air. Angle of Refrac- tion in the Water. Difference be- tween the Suc- cessive Angles of Refraction. De\iation. 0“ 0° 0° 10 T 29' 0 7° 29' 0 2° 31' 0 20 14 5: 48 7 2 2 48 5 8 12 30 22 I 27 7 9 39 7 58 33 40 28 49 26 6 47 59 11 10 34 50 35 4 0 6 14 34 14 56 0 60 40 30 20 5 26 20 19 29 40 70 44 48 41 4, 18 21 25 11 19 80 47 36 45 2 48 4 32 23 15 90 48 35 25 0 58 40 41 24 35 While therefore the angle of incidence in the air augments progressively io° at each advance, the angle of refraction in the water increases at a slower rate, and only attains its maximum—48° 35' 25—when the angle of incidence has reached 90° The last colunm of figures shows the pro- gressive increase in the deviation with a constant increase of 10° in the angle of incidence. When the ray passes from water to air the increase in the deviation, as the angle of incidence increases, is still greater. ln this case the result is as follows :— Angle oi Incidence in Water. 0° 5 1 o 15 20 25 30 35 40 45 4«“ 35' 25'' Angle of Refraction in Air. 0° 6“ 40' 24 13 23 14 20 II 16 27 7 53 34 17 5^ 41 48 39 49 53 II 58 59 15 70 31 50 Deviation of the Ray. o' 1° 40' 24' 23 14 5 11 16 7 7 53 9 17 53 11 48 39 14 53 11 18 59 15 25 50 41 24 35 o