P3H4O1T1O1P3R1O1D2U1C3T1I1O1N1
25 points
PHOTOPRODUCTION is validvalid
the production of one or more particles by the action of an incident photon
the production of one or more particles by the action of an incident photon
the production of one or more particles by the action of an incident photon
the production of one or more particles by the action of an incident photon