NATS 1870 Lecture Notes - Lecture 17: Refraction
1 Mar 2018
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Document Summary
Structural color (is sometimes called physical or geometrical colour) Color that results from the physical nature of the matter, which a light beam interacts with. Usually the material has a size similar to the wavelength of light and does not have selective absorption. The type of re ection with a mirror is called a specular re ection. This type of re ection produces a clear, well de ned image (ie a mirror) Re ection from an optically rough surface, the re ection occurs in all directions (ie a piece of paper) When light passes from one medium to another, which changes its direction and slows it down. The index of refraction is the factor by which light slows down. The greater the index of refraction, the greater the bending at the boundary. In most transparent materials, the speed of light depends on the material. For example, in the same material, violet light is refracted more than red light.
