The composition of these beams ensured that particles generated in the eye were below 500 MeV thereby allowing the researchers to separate one cause of the LF from the other .
500 MeV was considered the Cherenkov threshold .
The composition of these beams ensured that particles generated in the eye were below 500 MeV , which was considered the Cherenkov threshold , thereby allowing the researchers to separate one cause of the LF from the other .