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Nitrogen laser produces a radiation at a...

Nitrogen laser produces a radiation at a wavelength of `33.71 nm`. If the number of photons emitted is `5.6xx10^(24).` calculate the power of this laser.

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The correct Answer is:
`E=N hv=nh c/lambda=((5.6xx10^(24))(6.626xx10^(-34)Js)(3.0xx10^(8) ms^(-1)))/((33.71xx10^(-9) m))=3.3xx10^(6) J s^(-1)`
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