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A certain material has a dielectric permittivity eo and magnetic permeability 3,40.
An electromagnetic (EM) wave with frequency 430 x 101² Hz enters this material. What is the wave
speed inside the material?
C. 2.997 × 10° m/s
D. 8.126 x 108 m/s
A. 8.216 x 107 m/s
B. 1.095 x 10$ m/s

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