- the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision.
- the way a situation, action, event, etc., is perceived by the public or by a particular group of people: The optics on this issue are pretty good for the Democrats.Administrators worry about the bad optics of hiring new staff during a budget crisis.
- the branch of science concerned with vision and the generation, nature, propagation, and behaviour of electromagnetic light
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