Aditi Chauhan
Last Activity: 11 Years ago
Sol. The luminous flux of the given source of 1W is 450 lumen/watt
∴ Relative luminosity = Lu min ous flux of a source of given wavelength/ Lu min ous flux of 555 nm source of same power = 450/685 = 666%
[∴ Since, luminous flux of 555nm source of 1W = 685 lumen]