Spare slit for OPT090010 raybox (Each)

Spare Slit for Ray Box-Useful for studies of fundamental principles of optics
using the ray tracing technique. Comprising a well painted, die-cast metal box
with an enclosure that houses the electric bulb for use as a light-source in
the experiments. Open front of the bulb enclosure with holes all around the
bulb holder and extended side-fins on the outside of the enclosure assist in
the heat dissipation of the bulb. Integral side-rails are provided with a set
of vertical grooves on the inner side for accommodating various 45mm wide
mountings such as slit plate and cylindrical lens. The 12V bulb with vertical
straight filament is mounted in an SBC bulb holder with a two core flexible
connecting lead terminating in a pair of 4mm banana plugs for connecting it to
a low voltage AC power source. Additional slots permit the mounting of other
accessories or components such as colour filters for added experiments in ray
optics. Supplied complete with slit plate, double ended single/triple but
without collimating lens. [B]Note:[B] Please ensure that when ordering
replacement bulbs, the correct fitting is used.