1.

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.

Answer» `E=Nhv=Nhc/lambda`
`=((5.6xx10^(24))(6.626xx10^(-34)J s)(3.0xx10^(8) m s^(-1)))/((337.1xx10^(-9) m))`
`=3.3xx10^(6)J`


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