Concave Half-Cylinder Stainless Steel Mirror for Ray Box, 6.25 x 2.875"

This plane half-cylinder concave stainless steel mirror is designed for use with a ray box in tabletop optics experiments. The mirror measures approximately 6.25 x 2.875 inches and is approximately 1mm thick. The concave curved surface focuses reflected light rays to a focal point, while the plane half-cylinder shape allows students to observe how parallel rays converge after reflection. Suitable for demonstrating reflection principles, focal length, and image formation with a ray box. Designed for educational use. Minor surface imperfections may be present but do not affect the mirror's function for physics demonstrations.