Definition
Definition
The phot is the unit of illumination corresponding to the average illumination of a surface measuring 1 cm2 and which receives a luminous flux of 1 lumen. Le ph is worth 104 lux.
The phot is the unit of illumination corresponding to the average illumination of a surface measuring 1 cm2 and which receives a luminous flux of 1 lumen. Le ph is worth 104 lux.