1592952549000 1312632483000 term-2981 1616541413680 1312632487000 1616290317539 adlib fitz-online adlib-term-2981 adfe6143-0540-3bbd-b247-e1fa2eaeca49 2 1 radiation (electromagnetic) radiation (electromagnetic) term reference term-3139 adlib-term-3139 1139ddbf-45c2-3ecb-9c21-766210837c3e electromagnetic radiation