luminous intensity; candela
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Meanings
1 sense · 3 examplesnoun
luminous intensity; a physical quantity representing the brightness of a light source in a particular direction
In photometry, this measures the perceived power of light emitted by a source in a specific direction. The SI base unit is the candela (cd). Distinguished from illuminance (照度) which refers to light received on a surface.
Fā发
guāng光
qiáng强
dù度
de的
guó国
jì际
dān单
wèi位
shì是
kǎn坎
dé德
lā拉
。
The SI unit of luminous intensity is the candela.
Wǒ我
men们
xū需
yào要
cè测
liáng量
zhè这
gè个
LEDL
dēngE
zàiD
gè灯
gè在
fāng各
xiàng个
shàng方
de向
fā上
guāng的
qiáng发
dù光
强
度
。
We need to measure the luminous intensity of this LED lamp in all directions.
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Rén人
yǎn眼
duì对
bù不
tóng同
bō波
cháng长
guāng光
de的
fā发
guāng光
qiáng强
dù度
gǎn感
shòu受
bù不
tóng同
。
The human eye perceives luminous intensity differently for light of different wavelengths.