optics n functioning as sing the branch of science concerned with vision and the generation, nature, propagation, and behaviour of electromagnetic light
n functioning as sing the study of the effect of aircraft-induced and atmospheric disturbances on the efficiency of laser weapons
n functioning as sing the study and use of beams of electrons and of their deflection and focusing by electric and magnetic fields
n functioning as sing the transmission of information modulated on light carried down very thin flexible fibres of glass
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