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GK QUESTION#3103

The deprecated unit name nit refers to a unit of which photometric quantity?

  1. ALuminous exposure
  2. BLuminanceCorrect answer
  3. CLuminosity
  4. DLuminous emittance
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Answer

B. Luminance

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Explanation

Nit is a deprecated name for the candela per square metre, a unit of luminance. Luminance describes directional light output per projected area; it differs from luminous intensity in candela and illuminance in lux.

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