TRANSMISSION
, in Optics, &c, denotes the property of a transparent or translucent body, by which it admits the rays of light to pass through its substance; in which sense, the word stands opposed to reflection.
For the cause of Transmission, or the reason why some bodies Transmit the rays, and others reflect them, see Transparency and Opacity.
The rays of light, Newton observes, are subject to fits of easy Transmission and reflection. See Light, and Reflection.