Which of the following X-rays has the largest intensity?

Explanation

Kα X-rays exhibit the largest intensity due to the considerable energy released when an electron transitions from the n=2 to n=1 energy level in an atom. This transition generates a strong ionization effect, allowing Kα X-rays to ionize a greater number of atoms in a short distance, resulting in their higher intensity. In contrast, Kß X-rays, while having greater penetration power, possess lower ionization and intensity. Kγ X-rays, although they penetrate effectively, also do not have the same ionization capability, making them less intense than Kα X-rays. The fourth option incorrectly assumes equal intensity across all types, which is not the case.