X-rays from a given X-ray tube operating under specified conditions have a minimum wavelength. The value of this minimum wavelength could be reduced by:
Correct answer: C. Increasing the potential difference between the cathode and the target
- A. Cooling the target
- B. Reducing the temperature of the filament
- C. Increasing the potential difference between the cathode and the target
- D. Reducing the pressure in the tube
Explanation
Increasing the potential difference between the cathode and the target can accelerate the electrons, resulting in higher energies when they interact with the target material. This increased energy can lead to X-rays with shorter wavelengths, effectively reducing the minimum wavelength.
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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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