The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.
To search for another term please use "Back to the list" to return to the main page or the e-ILV.
For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.
For advice on CIE Publications contact helpdesk@cie.co.at. Note the CIE Helpdesk cannot assist with technical enquiries.
cathode fall
cathode voltage drop
DEPRECATED: cathode drop
difference in electric potential due to the space charge near the cathode
Note 1 to entry: The cathode fall is expressed in volt (V).
Note 2 to entry: This entry was numbered 845-07-13 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-127 in CIE S 017:2011.