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Find the number of photons emitted per s...

Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength `6600 Å`. What is the photoelectric current assuming 3% efficiency for photoelectric effect. Given `h = 6.6 xx 10^(-34) Js`.

A

`(25)/(3) xx 10^(19)` J, 0.4 amp

B

`(25)/(4) xx 10^(19)` J, 6.2 amp

C

`(25)/(2) xx 10^(19)` J, 0.8 amp

D

None of these

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A
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