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Luminous Intensity Formula:
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Luminous intensity is a measure of the amount of light emitted by a light source in a specific direction. It quantifies the brightness or concentration of light in that direction and is measured in candela (cd).
The calculator uses the Luminous Intensity formula:
Where:
Explanation: The formula calculates the luminous intensity by dividing the total luminous flux (lumen) by the solid angle through which the light is distributed.
Details: Accurate luminous intensity calculation is crucial for lighting design, photometric measurements, and ensuring proper illumination levels in various applications including architectural lighting, automotive lighting, and display technologies.
Tips: Enter lumen value (total light output) and solid angle value (angular coverage). Both values must be positive numbers greater than zero.
Q1: What is the difference between lumen and luminous intensity?
A: Lumen measures total light output in all directions, while luminous intensity measures light concentration in a specific direction.
Q2: What is a solid angle and how is it measured?
A: Solid angle is a 3D angular measurement that describes the size of a cone-shaped region in space, measured in steradians.
Q3: What are typical values for luminous intensity?
A: Values vary widely depending on the light source. A typical candle produces about 1 candela, while LED lights can produce thousands of candelas.
Q4: How does luminous intensity relate to brightness perception?
A: Luminous intensity directly affects perceived brightness - higher intensity in a given direction results in brighter appearance from that direction.
Q5: Are there limitations to this calculation?
A: This calculation assumes uniform light distribution within the solid angle and may not account for variations in light distribution patterns.