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gabbagabbahey: thanx i read it :wink: ____________ tiny-tim hi yah I know ...if i do this i will get : k2 = \mu\epsilon w2 + i \mu\sigma w. but i don't need this i need Eq 9.126 in Ch 9 in Griffiths. Electrodynamics 3ed :biggrin: >> sorry i can't write it :) any way...

plez..I want your help :( I have HW is Difficult for me if anybody can help me :( Q1: 1)In a conducting media the wave equation: \Delta^2E=\mu\sigmadE/dt+\mu\epsilond2E/dt2 has solution of the type E(z, t) = E0 exp [ i (kZ –w t)], where \kappa^2 = \mu\epsilon w2...