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The relation between the speed of light, permeability and permittivity is

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The relation between the speed of light, permeability and permittivity is

(a) C = 1/√(με)

(b) C = με

(c) C = μ/ε

(d) C = 1/με

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Question is taken from Plane Waves in Dielectrics topic in chapter EM Wave Propagation of Electromagnetic Theory

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Right choice is (a) C = 1/√(με)

For explanation I would say: The standard relation between speed of light, permeability and permittivity is given by c = 1/√(με). The value in air medium is 3 x 10^8 m/s.

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