Box, Light Ray (base, lid, and 3 masks: narrow-slit, no-slit, wide-slit)

Box, Light Ray (base, lid, and 3 masks: narrow-slit, no-slit, wide-slit) is a component of the following STC Program unit(s): Light (item #975206); Exploring the Nature of Light (items #976601, #976601U5); Electricity, Waves, and Information Transfer (items #512801, #512801U5).