Luminance 2


Luminance 2 : (Opt; Symb: B) The brightness of an illuminated surface, typically expressed in candelas per square foot. Note: Since surfaces do not reflect perfectly, the reflection factor must be taken into account. Thus, luminance = illuminance x reflection factor. This is expressed in foot lamberts (1/4 candelas per square foot); luminance is equal to KE, where K is the reflection factor and E is footcandles incident
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