Chemistry 2223B Lecture Notes - Lecture 1: Emission Spectrum, Subtractive Color, Absorption Band
15 Mar 2015
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Document Summary
White light: comprised of a continuum of different colours, ex. Sunlight: if passed through clouds or a prism can be split up into its constituents colours. Colours we observe are in the visible region of the electromagnetic spectrum. Electromagnetic energy comes from a wide range of energies. Eyes only measure light that hits them. If colour that has been absorbed from white light falls within visible region of spectrum reflected or transmitted light is usually perceived by eyes as the complementary of absorbed colour. White light contains all colours that balance out each other. Complementary-colour system only works when an object is illuminated by white light. Light comprising of just one colour or wavelength. Colours and intensities absorbed by a chemical compound dissolved in solution can be measured by passing light through it. Detector measures transmitted and reference beams, and the difference in intensity of these 2 beams corresponds to amount of light absorbed by the sample at that .
