photometric quantity
physical quantity taking into account the response of the human visual system
luminous flux
physical quantity
luminous energy
scalar physical quantity
nit
unit of luminance, equal to 1 cd/m²
luminance
photometric measure of the luminous intensity per area of light travelling in a given direction
luminous intensity
luminous flux per solid angle in a given direction
illuminance
luminous flux incident on a surface per area
luminous exposure
incident luminous energy per area
photometric quantity
measure used in astronomy