What is the difference between illuminance and brightness?

Definitions

- Referring to the amount of light that falls on a surface per unit area. - Talking about the measurement of light intensity in a specific location. - Describing the brightness of a light source as it is perceived by the human eye.

- Describing the level of light emitted by a light source. - Referring to the intensity of light as perceived by the human eye. - Talking about the degree of lightness or darkness of a color or image.

List of Similarities

  • 1Both words relate to the concept of light.
  • 2Both words describe the intensity of light.
  • 3Both words can be used to describe light sources.

What is the difference?

  • 1Usage: Illuminance is typically used in technical or scientific contexts, while brightness is more commonly used in everyday language.
  • 2Measurement: Illuminance is measured in lux, while brightness is not measured in any specific unit.
  • 3Focus: Illuminance focuses on the amount of light falling on a surface, while brightness focuses on the intensity of light as perceived by the human eye.
  • 4Subjectivity: Brightness is subjective and can vary from person to person, while illuminance is objective and can be measured with instruments.
  • 5Scope: Illuminance is a more specific term than brightness, which has a broader range of meanings.
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Remember this!

Illuminance and brightness are both related to the concept of light and describe its intensity. However, illuminance is a more technical term used to measure the amount of light falling on a surface, while brightness is a more general term used to describe the intensity of light as perceived by the human eye.

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