Measurement Of Light

Health Hygiene & Sanitation

Lesson 16 : Lighting And Noise

Measurement Of Light

  • Light is a band in the electromagnetic spectrum with wavelength of 380 – 780 nm
  • Light with all visible waves is perceived as white
  • Four measures of light are
    • Luminous intensity-measured as ‘candela or candle power’
    • Luminous flux-measured as ‘Lumen’
    • Illumination or Illuminance-measured in ‘Lux’ per unit area, it is also ‘foot candle’
    • Brightness or Luminance-measured as ‘lambert’

Recommended by the ‘International Organisation for Standardization’

Last modified: Tuesday, 24 April 2012, 6:45 AM