Machine-translated by Google. Questions are authored in English.
Top

Discussion

Illuminant C was largely superseded by D65 because illuminant C

  • A.cannot be realised by any physical light source
  • B.was found to have an incorrect colour temperature
  • C.has too little ultraviolet content to represent daylight
  • D.has altogether too much ultraviolet content for practical use

Answer: C

Its deficiency in the ultraviolet made it unsuitable once fluorescent brighteners became common. The D series was derived from measurements that included the ultraviolet region. Brighteners made the deficiency untenable.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.