Luminous flux
Chiedza chinobudiswa nechiedza pachikamu chenguva chinonzi luminous flux yemwenje sosi φ Represent, unit name: lm (lumens).
kusimba kwechiedza
Iyo inopenya inoyerera inoburitswa nemwenje sosi muyuniti yakasimba kona yegwaro rakapihwa inotsanangurwa sekusimba kwechiedza chemwenje kwairi munzira, inoratidzwa seI.
I=Luminous flux pakona chaiyo Ф ÷ Yakananga kona Ω (cd/㎡)
kupenya
Iyo inopenya inoyerera pachikamu cheyuniti payuniti yakasimba kona yechivheneko munzira yakati.Inomiririrwa naL. L=I/S (cd/m2), candela/m2, inozivikanwawo segreyscale.
kuvhenekera
Iyo inopenya inoyerera yakagashirwa pachikamu chenzvimbo, inoratidzwa muE. Lux (Lx)
E=d Ф/ dS(Lm/m2)
E=I/R2 (R=chinhambwe kubva pachiedza kusvika kundege ine chiedza)