Which one of the following statements is WRONG in the context of X-ray...
Understanding X-ray Generation in X-ray Tubes
In the context of X-ray generation, let's analyze the statements provided:
Statement A: Wavelength of Characteristic X-rays
- Characteristic X-rays are produced when an electron from a higher energy level fills a vacancy in a lower energy level of an atom.
- The energy of these X-rays is related to the atomic number (Z) of the target material.
- As the atomic number increases, the energy levels are closer together, leading to a decrease in wavelength.
- Conclusion: This statement is correct.
Statement B: Cut-off Wavelength of Continuous X-rays
- Continuous X-rays (or Bremsstrahlung radiation) are produced when energetic electrons are decelerated upon interacting with the target material.
- The cut-off wavelength is determined by the maximum energy of the electrons, which is primarily influenced by the applied voltage (kV) across the X-ray tube, rather than the atomic number of the target.
- Conclusion: This statement is incorrect, making it the wrong choice.
Statement C: Intensity of Characteristic X-rays
- The intensity of characteristic X-rays is indeed dependent on the electrical power supplied to the X-ray tube.
- Higher power results in more electrons being accelerated and more X-ray photons being produced.
- Conclusion: This statement is correct.
Statement D: Cut-off Wavelength of Continuous X-rays
- The cut-off wavelength is related to the maximum kinetic energy of the electrons, which is dictated by the voltage applied in the tube.
- Thus, it depends on the energy of the electrons, not on the atomic number.
- Conclusion: This statement is correct.
Final Remarks
- In summary, Statement B is the only incorrect statement regarding X-ray generation in X-ray tubes, as it mistakenly attributes the cut-off wavelength of continuous X-rays to the atomic number of the target.