Angle of Incidence

A glass prism lay forgotten across the sill, intercepting the afternoon light. It threw a fractured spectrum against the white paint—sharp geometric bands of red, amber, and violet. I approached and paused at the edge of the blue band. With deliberate pressure, my hand pushed the triangular corner half an inch to the left. The refractions shifted across the frame, settling into orderly parallel lines against the wall. Clean geometry restored.