Practice question

**Ozone layer depletion** environmental concern related to increased UV-B reaching surface, causing skin cancer, cataracts, damage to crops and marine life, due to CFCs releasing Cl that catalytically destroys O₃, O₃ absorbs UV 200-320 nm, depletion increases UV transmission. The document mentions that welders wear special glass goggles or face masks to protect their eyes from the large amounts of UV radiation produced by welding arcs. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Wear special glass goggles, illustrating EM wave transverse nature and Maxwell's displacement current concept.