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temperatur temperature of the triple point
e of water
The amount of substance of a N
system which contains as many
amount of elementary entities as there are
mole mol
substance atoms in 0.012 kilogram of
carbon 12. [n 4]
The luminous intensity, in a J
given direction, of a source that
emits monochromatic radiation
12
luminous of frequency 540×10 hertz
candela cd
intensity and that has a radiant intensity
in that direction of 1/683 watt
per steradian.
Derived units with assigned names
Symbo
Quantity Unit Equals Definition / Note
l
Space and time:
The plain angle
which, when
Plane angle radian rad centered in a circle,
cuts off an arc whose
length is equal to the
circle radius.
The solid angle
which, when
centered in a sphere,
Solid angle steradian sr
cuts off a cap whose
surface equals that of
a square having the
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