Sometimes sub-divided into Classical Optics ¥reflection, refraction, diffraction,dispersion, ray? and wave theories of optics, Fourier? optics, and the [geometric optics]? of lenses, mirrors and prisms¤ and Modern Optics ¥quantum optics, lasers, holography?, crystal optics and nonlinear optics©¤
The field of optics usually describes the behaviour of visible?, infrared and ultraviolet light; however since light is a [electromagnetic wave]?, analogous phenomena occur in X-rays?, microwaves, radio waves and other forms of electromagnetic radiation© Optics can thus be regarded as a sub-field of electromagnetism©
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