Led light box optical set rvfm rvfm p a comprehensive light and optics set including a 3 beam ray box and a selection of lenses and prisms teacher s notes and 9 pupil work cards p p the set is ideal for advanced study of light and optics and includes experiments to show refraction and reflection through various shaped prisms and lenses the splitting of light into rainbow colours how internal reflection is used in fibre optic cables and the appropriate lenses to use to correct long a