For faster navigation, this Iframe is preloading the Wikiwand page for 坎德拉.



坎德拉(英语即拉丁语candela)又称烛光,是发光强度的单位,国际单位制七个基本单位之一,符号 cd

1979年10月第十六届国际计量大会将坎德拉定义为:给定一个频率为540.0154×1012 Hz的单色辐射光源(黄绿色可见光),该辐射源在某个方向的辐射强度英语Radiant intensity为1/683瓦特球面度,则该辐射源在该方向的发光强度为1坎德拉[1]。1坎德拉的点状光源所发出的总光通量为4π流明。一支普通蜡烛的发光强度约为1cd。




  1. ^ Unit of luminous intensity (candela). The NIST Reference on Constants, Units, and Uncertainty. [2013-11-24]. (原始内容存档于2013-12-16). 
{{bottomLinkPreText}} {{bottomLinkText}}
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!

Your input will affect cover photo selection, along with input from other users.