In a certain medium the war no k feq w are related by the relation, (4( Hak) W where c a are constents if Ug is the group velocity Up is the phane velacity then (a) Ug Up (b) Vp Vy (1 at ) (1 2ak) (c) uz up C (d) vgvp c (1 2ak In a certain medium the war no k feq w are related by the relation, (4(...

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Elements of Electromagnetics

ISBN: 978-0195134773

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