Luminance

Luminance is a measure of the brightness of a light source or surface as perceived by the human eye. It describes how much light is emitted, reflected, or transmitted in a given direction. Measured in candelas per square meter (cd/m²), it helps differentiate how light affects our vision. For example, a well-lit room has higher luminance than a dimly lit one. Luminance is important in various fields, including photography, television, and lighting design, as it influences how we experience and interact with visual environments.