focus, focal point (point at which reflected or refracted rays of light converge) · focus (point of a conic at which rays reflected from a curve or surface converge) · focus
çekim: çoğul Brennpunkte · tamlayan Brennpunkts
eş: Fokus
köken: Calque of New Latin pūnctum ūstiōnis (17th c.), after the fact that sun rays burn when concentrated in a focus. By surface analysis, brennen + Punkt