lux

/lʌks/

Thân thiện

A scientist measures the lux level in a room with a light meter.

Definition

Noun: - A unit of illumination: A lux is a standard unit of measurement for illuminance, which is the amount of luminous flux (light) falling on a surface. It is defined as one lumen per square meter. It is used in physics and engineering to quantify lighting levels.

Usage

• The lux is the SI (International System of Units) unit for illuminance.
• It is used to measure how brightly a surface is illuminated, such as in photography, workplace safety standards, architecture, and plant growth studies.
• Example:

Advanced Usage

• "Lux level": A common phrase referring to the measured illuminance in a specific area.
  • The factory floor must maintain a minimum lux level of 300 for safe operation.
• Scientific comparisons often involve converting between lux and other units like foot-candles (1 lux ≈ 0.0929 foot-candles).

Variants and Related Words

• Illuminance (n): The quantity that the lux measures; the total luminous flux incident on a surface per unit area.
• Lumen (n): The SI unit of luminous flux, which is a measure of the total quantity of visible light emitted by a source. A lux is one lumen per square meter.
• Foot-candle (n): A non-metric unit of illuminance. One foot-candle is approximately 10.76 lux.

Synonyms

• Illuminance unit: A more general term for units measuring light on a surface.
• (Note: There are no direct synonyms for "lux" as a specific unit, but it is a type of .)

Related Phrases

• "Lux meter": A device used to measure illuminance in lux.
  • The technician used a lux meter to check the lighting in the classroom.

Notes

• The word "lux" is singular; the standard plural form is lux (e.g., 10 lux, 100 lux). The form "luxes" is rarely used in technical contexts.
• It is derived from the Latin word for "light."

Học thuật

Noun

1. a unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle

Từ đồng nghĩa

• lx