Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is 5.6×1024, calculate the power of this laser.
The power of the laser is,
E=Nhcλ
where
E=power of the laser
N=No of photons =5.6×1024
h=Planks constant=6.626×10−34
c= speed of light=
3.0×108
E=5.6×1024×6.62×10−34×3×108337.1×10−9=3.3×106J/s=3.3×106W