Practice question

**X-rays and gamma rays in medicine** X-rays imaging because bone absorbs more than tissue, contrast, CT scan uses multiple X-ray projections, gamma knife uses focused gamma rays to destroy tumor with minimal surrounding damage, illustrating high-energy EM wave medical use. The document notes that Maxwell's work unified electricity, magnetism, and light, leading to the understanding that light is an electromagnetic wave and paving the way for technologies like radio communication. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields Understanding light as an electromagnetic wave, illustrating EM wave transverse nature and Maxwell's displacement current concept.