A new design, high quality ray box for ray tracing in optics experiments. The light source is a high intensity white LED which runs at low temperature. Ships with removable slit plate and lens to provide one or three parallel rays. The unit will operate at constant intensity from either a d.c. lab supply or plug top power adaptor in the range of 9 to 30V so there is no issue of overloading the unit with a standard power pack.
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