A screen receives of radiant flux of wavelength . One lumen is equivalent to of monochromatic light of wavelength . If relative luminosity for is 0.685 while that for is 1.00, then the luminous flux of the source is |
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a) |
b) |
c) |
d) |

A screen receives of radiant flux of wavelength . One lumen is equivalent to of monochromatic light of wavelength . If relative luminosity for is 0.685 while that for is 1.00, then the luminous flux of the source is |
|||||||

a) |
b) |
c) |
d) |

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