Practice question

**IR effectiveness in remote sensing** because IR scattered less than visible by atmosphere, can detect heat signatures, used in satellite imaging for vegetation, moisture, military night vision, illustrating application based on thermal emission and low scattering. Infrared waves emitted by the Earth's surface are absorbed and trapped by greenhouse gases, leading to an increase in atmospheric temperature, a phenomenon known as the greenhouse effect. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields They are trapped by greenhouse gases, illustrating EM wave transverse nature and Maxwell's displacement current concept.