Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is `5.6xx 10^(24)`, calculate the power of this laser.

Answer

`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)`