Practice question

**Hertz experiment** used induction coil connected to two rods with gap, spark produced oscillating charge, emitted EM wave, received by loop with gap sparking when E induced, measured wavelength by standing wave, demonstrated EM wave properties, validating Maxwell. The Ampere-Maxwell Law includes both conduction current and displacement current (due to the time rate of change of electric flux) as sources of a magnetic field, as per the document. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Conduction current and displacement current, illustrating EM wave transverse nature and Maxwell's displacement current concept.