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Question 33

Match the LIST-I with LIST-II

24th slot 1 33


Choose the correct answer from the options given below:

Solution

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  • A. Radio-wave $$\rightarrow$$ IV. due to rapid acceleration of electron 
  • Radio waves are typically produced by the accelerated or oscillatory motion of charges (electrons) in conducting wires, such as radio antennas.
  • B. Micro-wave $$\rightarrow$$ I. is produced by Magnetron valve

    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).

  • C. Infrared-wave $$\rightarrow$$ II. due to change in the vibrational mode of atoms
  • Infrared waves are essentially heat waves. They are produced by hot bodies and molecules as a result of the changes in the vibrational and rotational modes of the atoms and molecules.
  • D. X-ray $$\rightarrow$$ III. due to inner shell electrons moving from higher energy level to lower energy level

  • 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.

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