Magnetic Arcs at Twilight

Documentary event photograph of a magnetic-field demonstration at an indoor science evening, portrait 1:2. Tight beauty-editorial macro crop of dry iron filings scattered on a horizontal clear glass plate above a concealed bar magnet. Distinct granular chains form nested magnetic arcs, densely gathered near one pole in the lower third and curving upward into sparse, open glass. Individual grains remain visibly metallic and irregular, never liquid or ferrofluid. Oblique overhead viewpoint, 100mm macro lens, sharp focus across the principal arcs with gentle falloff toward the distant edge. Cool blue-hour window light washes the glass; a warm demonstration lamp grazes the grains with delicate copper highlights. Smooth, glaze-like reflections belong only to the glass. A narrow, softly blurred strip of the demonstration table establishes the real setting. Refined, uncluttered, generous breathing room above the pattern. No people, no text, no logos, no watermarks.