In free space (vacuum), where the net charge and
Chapter 31, Problem 31.58(choose chapter or problem)
In free space (vacuum), where the net charge and currentflow is zero, the speed of an EM wave is given byv = l/Veo^o- If, instead, an EM wave travels in a nonconducting(dielectric) material with dielectric constant K, thenv = l / y l e ^ . For frequencies corresponding to the visiblespectrum (near 5 X 1014 Hz), the dielectric constant of wateris 1.77. Predict the speed of light in water and compare thisvalue (as a percentage) with the speed of light in a vacuum.
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