Object appearance and colour
Abstract:
Various types of interaction of light with objects, namely reflection, refraction and scattering, with consequent effects on the physical appearance and colour of objects, have been discussed. Five mechanisms responsible for colour generation, namely physical phenomena (scattering, dispersion, diffraction and interference), atomic and molecular excitation, ligand field, molecular orbital and energy band transitions, are discussed with real world examples.
Key words
dispersion and diffraction of light; colour centre; ligand field; incandescence; scattering; light absorption
2.1 Introduction
When energy is created in an object, it may emit radiation. Electromagnetic radiation (EMR) is considered to be produced ...
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