<Dl> <Dd> u e = ε 0 2 E 2, u m = 1 2 μ 0 B 2 (\ displaystyle u_ (e) = (\ frac (\ epsilon _ (0)) (2)) \ left \ mathbf (E) \ right ^ (2), \ quad u_ (m) = (\ frac (1) (2 \ mu _ (0))) \ left \ mathbf (B) \ right ^ (2) \, \!), </Dd> </Dl> <Dd> u e = ε 0 2 E 2, u m = 1 2 μ 0 B 2 (\ displaystyle u_ (e) = (\ frac (\ epsilon _ (0)) (2)) \ left \ mathbf (E) \ right ^ (2), \ quad u_ (m) = (\ frac (1) (2 \ mu _ (0))) \ left \ mathbf (B) \ right ^ (2) \, \!), </Dd> <P> in SI units . </P> <P> Electromagnetic radiation, such as microwaves, visible light or gamma rays, represents a flow of electromagnetic energy . Applying the above expressions to magnetic and electric components of electromagnetic field both the volumetric density and the flow of energy in EM field can be calculated . The resulting Poynting vector, which is expressed as </P>

Which type of energy is not derived from the sun