Inspection of matter

Apparatus for automatically inspecting a stream of matter (14) comprised of objects (14) and automatically sorting the objects (14), comprising emitting means (38,50,60) serving to emit a detection medium to be active at the matter (14), first and second receiving means (19) of respective first and second inspection arrangements disposed side-by-side transversely of the stream, separate from each other and arranged to receive from the matter (14) detection medium varied by variations in the matter (14), first and second detecting means (22) of the respective first and second inspection arrangements (6) serving to receive the varied medium by reflection from the receiving means (19), and to generate first and second detection data respectively in dependence upon the variations in the medium, and data-obtaining means (26) connected to the first and second detecting means (22) and serving to obtain the detection data therefrom, and removing means (10,40) serving to remove objects (14) from the stream in dependence on the detection data.