natural philosophy, physical science, physics - the science of matter and energy and their interactions

light, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"

alteration, change, modification - an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago"

genius, brilliance - unusual mental ability

brightness - the location of a visual perception along the black-to-white continuum

wavering, fluctuation - the quality of being unsteady and subject to fluctuations; "he kept a record of price fluctuations"