Match the LIST-I with LIST-II

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Microwaves are produced by special vacuum electron tubes, with the Magnetron valve (or klystron) being one of the most common devices used to generate them (e.g., in microwave ovens and radar systems).

X-rays can be produced when high-energy electrons interact with matter. One common mechanism (characteristic X-rays) is when an inner-shell electron is knocked out, and an electron from a higher energy level drops down to fill the vacancy, emitting an X-ray photon in the process.