What is the difference between luminance and radiance?

Definitions

- Describing the amount of light emitted or reflected by a surface. - Referring to the brightness of an image or display. - Talking about the intensity of light in a specific area or scene.

- Describing the quality of shining or glowing with light. - Referring to the brightness or brilliance of a light source. - Talking about the beauty or splendor of a bright object or scene.

List of Similarities

  • 1Both words describe the quality of light.
  • 2Both words can be used to describe the brightness of an object or scene.
  • 3Both words are related to the visual perception of light.
  • 4Both words can be used in technical contexts, such as photography or lighting design.
  • 5Both words have Latin roots, with 'lumin-' meaning light and 'radi-' meaning ray.

What is the difference?

  • 1Focus: Luminance focuses on the amount of light, while radiance focuses on the quality of light.
  • 2Usage: Luminance is typically used in technical or scientific contexts, while radiance is more commonly used in artistic or poetic contexts.
  • 3Connotation: Luminance has a neutral or technical connotation, while radiance has a positive or aesthetic connotation.
  • 4Measurement: Luminance can be measured in units such as candelas per square meter, while radiance is not typically measured quantitatively.
  • 5Application: Luminance is often used in discussions of displays, screens, and lighting design, while radiance is often used in discussions of beauty, splendor, and visual art.
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Remember this!

Luminance and radiance both describe aspects of light, but they differ in their focus, usage, connotation, measurement, and application. Luminance refers to the amount of light emitted or reflected by a surface, while radiance refers to the quality of light and its aesthetic appeal. Luminance is more commonly used in technical or scientific contexts, while radiance is more commonly used in artistic or poetic contexts.

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