Match electromagnetic radiation with its common production mechanism. List I: A. Microwaves; B. Visible light; C. Gamma rays; D. Infrared rays. List II: I. Electrons in atoms fall from higher to lower energy levels; II. Radioactive nuclear decay; III. Vibrations of atoms and molecules; IV. Klystron or magnetron valve.
Options

Question

Match electromagnetic radiation with its common production mechanism. List I: A. Microwaves; B. Visible light; C. Gamma rays; D. Infrared rays. List II: I. Electrons in atoms fall from higher to lower energy levels; II. Radioactive nuclear decay; III. Vibrations of atoms and molecules; IV. Klystron or magnetron valve.

Options

G1 Physics · Accepted Answer

Step 1: Klystron and magnetron oscillators generate microwaves, so A → IV. Step 2: Transitions between atomic electronic levels can emit visible photons, so B → I. Step 3: Nuclear radioactive decay can emit gamma rays, so C → II. Step 4: Thermal vibration and molecular transitions are common sources of infrared radiation, so D → III. Final answer: A–IV, B–I, C–II, D–III (Option D).