Elementary treatise on physics experimental and applied for the use of colleges and schools (1890)
Ganot, A. (Adolphe), 1804-1887, Atkinson, E. (Edmund) · New York : W. Wood · leaf 555
tical prism ; but, instead of being deflected in a directionparallel to itself, as would be the case if the colours of the spectrum wereequally refracted, it is obliquely refracted in the direction rv\ proving thatfrom red to violet the colours are more and more refrangible. These different… … extremity of the spectrum are less refracted than those which are nearer theorange zone. In determining indices of refraction (538), it is usual to take,as the index of any particular substance, the refrangibility of the yellow rayin a prism formed of that substance. S38 On Light. [567- 567.…
Physics
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