↩ 🔵 🔵 🔵 ❪∂❫ Radiometry Math ○ ❪𝛿❫ Electromagnetic Quantities ○ ❪𝛿.❫ Photometric Quantities ○ Albedo ○◂ Intensity ○◂ Luminosity (L) ○◂ Radiance ○◂ Radiant Energy (Qₑ) ○◂ Radiant Flux (Φₑ) ○◂