An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is s=1.23E9 W/m^2.
a.What is the rms value of (a) the electric field and (b) the magnetic field in the electromagnetic wave emitted by the laser?
b.Assumed that the same laser is used to melt 1 kg Aluminum rod with a cross sectional area of 0.01 m2, at an initial temperature of 20°C, an specific heat of 910 J/g°C and a melting point of 660°C.