Question

Which one of the following statements is wrong in the context of $X$ -rays generated from an $X$ -ray tube?

• A. Wavelength of characteristic X-rays decreases when the atomic number of the target increases
• B. Cut-off wavelength of the continuous X-rays depends on the atomic number of the target
• C. Intensity of the characteristic X-rays depends on the electrical power given to the X-ray tube
• D. Cut-off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray tube

Answer 1

Answer: (B)

Cut-off wavelength depends on the applied voltage not on the atomic number of the target. Characteristic wavelengths depend on the atomic number of target.