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The number of photons per second on an a...

The number of photons per second on an average emitted by the souce of monochromatic light of wavelength 600 nm when it delivers the power ofd ` `3.3 x 10^-3` watt will be

A

`10^16`

B

`10^15`

C

`10^18`

D

`10^17`

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