QUANTITY
NAME
SYMBOL
EQUIVALENT UNITS
Angular Acceleration
radian per second squared
rad/s2
Angular Velocity
radian per second
rad/s
Plane Angle
radian
rad
m m-1 = 1
Radiance
watt per square metre steradian
W/(m2 sr)
Radiant Intensity
watt per steradian
W/sr
Solid Angle
steradian
sr
m2 m-2 = 1