...in the Appendix. "However ingenious the reasoning by which you try to show that, on the wave-theory, the sines of the angles of incidence and refraction are in a constant ratio, I can look on it as an illustration only, and not as a demonstration. I maintain that the problem of...

...same plane, or the plane of refraction is the same as the plane of incidence. The second law is that the sines of the angles of incidence and refraction are in a constant ratio, which is called the index of refraction. Describe a circle about the point of incidence I as centre...

...the points where it cuts the rays on the normal. The law is that these perpendiculars, R' P', S' P, will have a constant ratio, or the sines of the angles...of incidence and refraction are in a constant ratio ; that is, so long as the media through which the ray first passes, and by which it is afterwards refracted,...

...media is, that sin P ba , . ,. a. , — — =r^ — -. = m. a constant for these media ; sm P b a' or, the sines of the angles of incidence and refraction are in a constant ratio. This law is also true when the surface is curved as well as when it is a plane. 40. If the medium 1ST,...

...experimentally by Willebrord Snell in 1621. I. The refracted ray lies in the plane of incidence. II. The sines of the angles of incidence and refraction are in a constant ratio for the same two media. This constant ratio is really identical with the ratio of the velocity of light...

...BC of the incident A ray. So if i and r denote the angles of incidence and refraction, we have BE BC or the sines of the angles of incidence and refraction are in a constant ratio ; this is the law of refraction. Desiring to include all known phenomena in his system, Descartes 'devoted...

...magnitudes of the angles of incidence and reflexion are equal; that is, Z NBP = a = - Z NBR = Z RBN. (4) The sines of the angles of incidence and refraction are in a constant ratio, the value of which depends only on the nature of the two media which are separated by the refracting...

...magnitudes of the angles of incidence and reflexion are equal; that is, Z NBP = a = - Z NBR = Z RBN. (4) The sines of the angles of incidence and refraction are in a constant ratio, the value of which depends only on the nature of the two media, which are separated by the refracting...

...the points where it cuts the rays on the normal. The law is that these perpendiculars, R' P', S' P, will have a constant ratio, or the sines of the angles of * For further information, I roust refer my readers to Parkinson's "Treatise on Opties;" Herschd's...

...— This means that the incident ray, the normal, and the refracted ray all lie in one plane. (ii) The sines of the angles of incidence and refraction are in a constant ratio. Experimental Demonstration of Laws of Refraction. Let a graduated circle be taken similar to that used...