L’ipotesi della natura elettromagnetica della luce e la valutazione “classica” della sua velocità

Retracing the steps which led to formulate the hypothesis on electromagnetic nature of light, two circuits (RL, RC) in alternating current regimen were observed to measure the constants of vacuum permeability and permittivity, yielding μ₀ = (1,27 ± 0,51)·10⁻⁶ H/m, ε₀ = (6,1±2,2)·10⁻¹² F/m. Moreover, the speed of light was evaluated as c = (3,6±1,4)·10⁸ m/s, near the accepted value 2,99·10⁸ m/s