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 document states that ultraviolet rays range from about 400 nm to 0.6 nm . Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields 400 nm to 0.6 nm, illustrating EM wave transverse nature and Maxwell's displacement current concept.