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UPSEE 2019 Solved Paper
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© examsnet.com
Question : 41
Total: 150
'Lumen' is the unit of
luminous flux
luminous intensity
illuminance
light frequency
Validate
Solution:
The lumen is the SI derived unit of luminous flux, a measured of the total quantity of visible light emitted by a source per unit time.
where,
1 lumen
(
lm
)
=
1
C
d
∕
S
r
∵
C
d
=
candela and
S
r
=
steradians
∴
The correct option is (a).
© examsnet.com
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