A source emits 12.0 J of lightof wavelength 620 nm and 8.0 J of light of wavelength 580 nm persecond
Channel: Doubtnut
Date: 2020-07-12

A source emits 12.0 J of lightof wavelength 620 nm and 8.0 J of light of wavelength 580 nm per second. The relative luminosilty at 620 is 25% and that at 580 nm is 80%. Find a the total radiant flux, b. the total luminous flux and c. and luminous efficiency.