The energy associated with electric field is (UE) and with magnetic field is (UB) for an electromagnetic wave in free space. Then :

Question

The energy associated with electric field is (U_E) and with magnetic field is (U_B) for an electromagnetic wave in free space. Then :

${U_E} = {{{U_B}} \over 2}$

${U_E} > {U_B}$

${U_E} < {U_B}$

${U_E} = {U_B}$

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