Luminous intensity is a measure of the amount of light emitted in a particular direction from a source. It quantifies the brightness of a light source as perceived by the human eye.

Common examples of units related to luminous intensity include candela (cd) and lumens (lm), which are used to measure the amount of light emitted by a source in a specific direction or across a given area.

• Luminous intensity is crucial in designing lighting systems for various applications.
• It helps in determining the brightness and visibility of light sources in different environments.
• Luminous intensity is also important in the field of optics for studying light propagation and reflection.