The light source is mounted under an adjustable lid, designed so that minimum light emerges in unwanted directions.
The raybox can be used in a single-ray mode without using the plano-convex lens. However, with the lens inserted (plane face towards the light source), and using the two-slit, three-slit or broad-slit masks, the emergent light can be made to be divergent, convergent or parallel by adjusting the position of the light source in relation to the lens.
These facilities enable the raybox to be used in a wide range of optical experiments with transparent flatbased blocks, prisms and mirrors.
The coloured filters can be used to produce beams of coloured light, but external light levels have to be reduced for maximum effectiveness.
Power requirement: 12V AC or DC connected to two 4mm sockets on the raybox.
Accessories: Plano-convex lens of focal length 75mm; 2 plastic masks with, respectively, one and two thin slits, three thin slits and one broad slit; 7 coloured filters and 1 tri-colour filter, mounted in 50 x 50mm plastic frames
