A15.0-mw laser puts out a narrow beam 2.00 mm indiameter.
what is the average (rms) value of the magneticfield?

Explanation:

It is known that formula for energy per unit area per unit time is as follows.

             S =

                =

              E =        

Now, putting the values we will calculate the electric field as follows.

            E =

               =  

               = 1341.03 V/m

Now, we will calculate the average magnetic field as follows.

                   B =

                      =

                      = T

                      =

Thus, we can conclude that the average (rms) value of the magnetic field is .

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