_The Sines of Incidence, Reflexion, and Refraction, are the Sines of the Angles of Incidence, Reflexion, and Refraction._
DEFIN. VI.
From Opticks: A Treatise of the Reflections, Refractions, Inflections and Colours of Light by Isaac Newton.
From Opticks: A Treatise of the Reflections, Refractions, Inflections and Colours of Light by Isaac Newton.
_The Sines of Incidence, Reflexion, and Refraction, are the Sines of the Angles of Incidence, Reflexion, and Refraction._