Evolution of SI Base Unit Candela: Quantifying the Light Perception of Human Eye

Autor:	V. K. Jaiswal, Shibu Saha, Parag Sharma, Dinesh K. Aswal
Rok vydání:	2020
Předmět:	Physics and Astronomy (miscellaneous) business.industry Computer science Human physiology Light perception medicine.anatomical_structure Optics SI base unit medicine Human eye Luminous efficacy Candela business Photopic vision
Zdroj:	MAPAN. 35:563-573
ISSN:	0974-9853 0970-3950
DOI:	10.1007/s12647-020-00413-1
Popis:	The redefinitions of the seven SI base units, as approved and adopted by the 26th CGPM, now depend on the seven defining constants, respectively. Candela is one of the seven base units, which is related to the measurement of light as perceived by the human eye. It is the only base unit to be related to the human physiology and gives a physical base to the phenomenon of vision. Over the period of time, Candela has evolved from its candle-based definition to being defined in terms of the defining constant, Kcd (maximum luminous efficacy of photopic vision). The present article describes the evolution of Candela and briefly discusses the current requirement for Quantum Candela.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c3e942ff70f6715cc8a0c790d403f99b https://doi.org/10.1007/s12647-020-00413-1 Zobrazit plný text záznamu Full text from SpringerLink