e-ILV

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.

17-21-107

photon

quantum of electromagnetic radiation considered as a particle of energy hν, where h is the Planck constant and ν the frequency of the radiation

Note 1 to entry: A photon is an elementary particle of spin 1 and having zero rest mass.

Note 2 to entry: This entry was numbered 17-918 in CIE S 017:2011.

back to the list

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.

CIE Webshop

Welcome to the official CIE Online Standards Store!
(Other distributors are not authorized)

Members receive a 66,7 % discount!
Why not join the NC in your country today?

To the Webshop

Licht2023

CIE TC 4-62 Adaptive Road Lighting - call to participate

CIE Australia Lighting Research Conference February 7, 2023

New CIE JTC Call for Experts

CIE TC 3-62 Call to Participate

CIE 251:2023 LED Reference Spectrum for Photometer Calibration

CIE standard illuminant A was introduced in 1932 to represent typical tungsten-filament lighting in colorimetry, and for decades it has been used as a reference spectrum in photometer calibrations.
In 2018, CIE... more

CIE DIS 017-SP2:2023 ILV: International Lighting Vocabulary –Supplement 2: Terms and Definitions for Horticultural Lighting

With the rapid development of the application of optical radiation in the field of plant growth in recent years, different types of stakeholders with different backgrounds are coming together; for example, lighting... more

ISO/CIE 11664-5:2023 Colorimetry — Part 5: CIE 1976 L*u*v* colour space and u’, v’ uniform chromaticity scale diagram

The committee responsible for this document is ISO/TC 274, Light and lighting. This second edition cancels and replaces the first edition (ISO 11664-5:2009), of which it constitutes a minor revision. ISO 11664 consists of the... more

ISO/CIE DIS 28077(E):2023 Photocarcinogenesis action spectrum (non-melanoma skin cancers)

ISO/CIE 28077 was prepared by CIE Technical Committee 6-32, Action Spectrum for Photocarcinogenesis, as CIE S 019. The committee responsible for this document is ISO/TC 274, Light and lighting.

Solar... more