Kelvin is the fundamental unit of the luminosity of a source in S.I.
Hence, the given statement is false.
The modern unit of luminosity of light is
The old unit of the luminosity of light is
Lumen is the old unit of luminosity of light
The luminous flux of a monochromatic source of 1 W is 450 lumen watt−1. Find the relative luminosity at the wavelength emitted.