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 mentions that the ozone layer absorbs most ultraviolet (UV) radiation, protecting life on Earth. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Ultraviolet rays, illustrating EM wave transverse nature and Maxwell's displacement current concept.