A screen receives 3 watt of radiant flux of wavelength 6000 Å . One lumen is equivalent to watt `1.5 xx 10^(-3) "watt"` of monochromatic light of wavelength 5550 Å . If relative luminosity for 6000 Å is 0.685 while that for 5550 Å is 1.00, then the luminous flux of thesource isA. `4 xx 10^(3) lm`B. `3 xx 10^(3) lm`C. `2 xx 10^(3) lm`D. `1.37 xx 10^(3) lm`

A screen receives 3 watt of radiant flux of wavelength 6000 Å . One l

1.	A screen receives 3 watt of radiant flux of wavelength 6000 Å . One lumen is equivalent to watt `1.5 xx 10^(-3) "watt"` of monochromatic light of wavelength 5550 Å . If relative luminosity for 6000 Å is 0.685 while that for 5550 Å is 1.00, then the luminous flux of thesource isA. `4 xx 10^(3) lm`B. `3 xx 10^(3) lm`C. `2 xx 10^(3) lm`D. `1.37 xx 10^(3) lm`
Answer» Correct Answer - d

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