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The relative electric permittivity of a medium is 9 and the relative permeability is close to unity. What is the speed of em waves in the medium? |
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Answer» tion:The SPEED of light in the medium, V= μ r ϵ r c =0.5× (4)(9) 3×10 8 m/s =10 8 m/sHence, the magnitude of electric FIELD =vB=0.5×10 8 m/s×4.2×10 −8 T =2.1Vm −1 |
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