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20. La radiaci

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Physics

20.La radiaci

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3.8 Ratings (714 Votes)

The intensity of the electromagnetic wave is,

                I = Eo2/2cuo

Here, c is the speed of light, uo is the permiability of free space, and Eo is the maximum electric field.

Thus, the mnaximum electric field strength is,

              Eo = [2cuoI]1/2

                    = [(2)(3x108 m/s)(4(pi)x10-7 T.m/A)(1350 W/m2)]1/2

                    = 1008.9 N/C

                    = 1.0089x103 N/C

                    = 1.00x103 N/C

Note: Unit of electric field is N/C or V/m.
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