1. It is obtained by dividing the luminous flux by the radiant flux . 2. Watts are units of radiant flux while lumens are units of luminous flux. 3. Chemical actinometry involves measuring radiant flux via the yield from a chemical reaction. 4. Let us show the relation between them using the radiant flux as an example: 5. Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux . 6. Thus, a 60 watt light bulb emits a total radiant flux of about 45 watts. 7. The radiant flux ( i . e . solar power ) absorbed by the Earth is thus given by: 8. The radiance of an optical system is equal to the derivative of the radiant flux with respect to the etendue. 9. Where is the radiant flux measured at distance ( in parsecs ), the radiant flux measured at distance 10 pc } }. 10. Where is the radiant flux measured at distance ( in parsecs ), the radiant flux measured at distance 10 pc } }.
Mobile