Easy· Electromagnetic Spectrum (Microwaves)· +4 / −1
Match List I with List II:
List-I (Electromagnetic wave): A. Microwave, B. Visible light, C. Gamma rays, D. Infra-red rays
List-II (Production): I. Electrons in atoms emit light when they move from a higher energy level to a lower energy level, II. Radioactive decay of nucleus, III. Vibration of atoms and molecules, IV. Klystron valve or magnetron valve
Choose the correct answer from the options given below: