What is Luminance?
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Radiant power weighted by a spectral sensitivity function that is characteristic of vision. Luminance was created to describe scientifically why we experience different sensations towards objects with different brightnesses. Luminance is similar to intensity in that it is proportional to the physical power of the light source. For example: When we watch television, the sun appears to be brighter than a building or tree. It appears to be emitting more light so it has a greater luminance. But in reality, each pixel in the screen is emitting the same amount of energy, thus everything on the screen has equal intensity. |
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