JEE Main · 2020 · 05 Sep 2020 · Shift 2 · EM Waves

Energy and wavelength vary oppositely through $E=\frac{hc}{\lambda }$, so the most energetic radiation has the shortest wavelength. Gamma rays are shortest at about $10^{-15}$ m, X-rays next at about $10^{-10}$ m, microwaves near $10^{-3}$ m, and AM radio waves longest at about $100$ m. Matching each band to its wavelength gives microwave with $10^{-3}$ m, gamma rays with $10^{-15}$ m, AM radio waves with $100$ m, and X-rays with $10^{-10}$ m.