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When sunlight falls normally on earth, a...

When sunlight falls normally on earth, a luminous flux of `1.57 xx 10^(5) "lumen"//m^(2)` is produced on earth. The distance of earth from sun is `1.5 xx 10^(8) Km`. The luminous intensity of sun in candela will be

A

`3.53 xx 10^(27)`

B

`3.53 xx 10^(25)`

C

`3.53 xx 10^(29)`

D

`3.53 xx 10^(21)`

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The correct Answer is:
a
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ERRORLESS -RAY OPTICS-Photometry
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  12. A lamp is hanging along the axis of a circular table of radius r. At w...

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  13. A point source of 100 candela is held 5 m above a sheet of blotting pa...

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  14. A lamp is hanging at a height 40 cm from the centre of a table. If its...

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  15. An electric lamp is fixed at the ceiling of a circular tunnel as shown...

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  16. When sunlight falls normally on earth, a luminous flux of 1.57 xx 10^(...

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  17. In the above problem, the luminous flux emitted by sun will be

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

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