Solution
The power of the laser is,
E=
λ
Nhc
where
E=power of the laser
N=No of photons =5.6×10
24
h=Planks constant=6.626×10
−34
c= speed of light=3.0×10
8
E=
337.1×10
−9
5.6×10
24
×6.62×10
−34
×3×10
8
=3.3×10
6
J/s=3.3×10
6
W