More technically, the surface's luminance is isotropic, and the luminous intensity obeys Lambert's cosine law.
12.
Luminous intensity is determined by measuring the brightest spot in the beam produced by the flashlight, in candelas.
13.
The luminous intensity of light-emitting diodes is measured in millicandelas ( mcd ), or thousandths of a candela.
14.
In optics, "'Lambert's cosine law "'says that the radiant intensity or luminous intensity observed from an ideal surface normal.
15.
Prior to the definition of the candela, a variety of units for luminous intensity were used in various countries.
16.
The number 683 is connected to the modern ( 1979 ) definition of the candela, the unit of luminous intensity.
17.
The first of these classes includes the seven SI base units for length, mass, time, temperature, electric current, luminous intensity and amount of substance.
18.
After World War II Gershun worked on a luminous intensity measurement method and published several papers devoted to theoretical aspects of fade light photometry.
19.
The term can refer to any of irradiance, luminous intensity, radiant intensity, or radiance, depending on the background of the person using the term.
20.
The luminous intensity of this flat " portrait lens " was substantially higher than the daguerre standard of 1839, the Wollaston Chevalier lens ( ).
