Practice question

**Greenhouse effect** IR absorbed by CO₂, H₂O, CH₄, warming Earth, excessive greenhouse due to fossil fuel burning raises temperature, EM waves role: Sun visible reaches surface, Earth emits IR trapped, altering energy balance, safety concern for climate change. The document explains that UV radiation, which causes tanning, is absorbed by ordinary glass, preventing it from passing through. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Glass absorbs UV radiation, illustrating EM wave transverse nature and Maxwell's displacement current concept.