The dimension of 1/(με) is the same as the dimension of , where μ is the magnetic constant and ε the permittivity.

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(2) Square of velocity. Given: 1/(με), with μ the permeability and ε the permittivity of the medium. Idea: the speed of an electromagnetic wave in a medium is v=1/(√με). Squaring both sides, v²=1/(με). Check it from the constants: [μ]=M¹L¹T⁻²A⁻² and [ε]=M⁻¹L⁻³T⁴A², so [με]=M⁰L⁻²T² and its reciprocal is M⁰L²T⁻². M⁰L²T⁻² is (L¹T⁻¹)², so the answer is the square of velocity.

The dimension of 1/(με) is the same as the dimension of ________, where μ is the magnetic constant and ε the permittivity.

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