The medal is awarded in three versions: gold is for outstanding original scientific work in physics or chemistry published during the previous year; silver is for outstanding writing of science for a popular audience over several years; and bronze is for outstanding popularization of science through non-written methods, such as in museums or through business.
The medal is awarded in three tiers: gold recognizes pioneering research in physics or chemistry within a single year; silver honors sustained science writing for diverse audiences; and bronze celebrates science popularization through hands-on experiences, public exhibitions, or business partnerships.