what energy conversion takes place during the propagation of electromagnetic waves?

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$E l e c t r o m a g n e t i c w a v e c o n s i s t o f e l e c t r i c a n d m a g n e t i c f i e l d a n d h e n c e b o t h e l e c t r i c a n d m a g n e t i c e n e r g y a s s o c i a t e d w i t h i t . B o t h e l e c t r i c a n d m a g n e t i c f i e l d i n i t v i b r a t e i n t h e s a m e p h a s e b u t t h e a v e r a g e v a l u e o f e l e c t r o s t a t i c e n e r g y p e r u n i t v o l u m e o f s p a c e = \frac{1}{4} \in {E_{0}}^{2} (E_{0} i s t h e a m p l i t u d e o f e l e c t r i c w a v e) m a g n e t i c e n e r g y p e r u n i t v o l u m e o f s p a c e = \frac{{B^{2}}_{0}}{4 μ} (B_{0} i s t h e a m p l i t u d e o f m a g n e t i c f i e l d) B u t t h e r e i s n o s u c h c o n v e r s i o n o f e n e r g y . R e g a r d s$

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