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. Electromagnetic waves are produced by accelerated charges. Stationary charges produce only electrostatic fields, not time-varying fields required for EM waves. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields A charge moving with uniform velocity, illustrating EM wave transverse nature and Maxwell's displacement current concept.