If a target element with atomic number Z used in the production of x-rays is replaced by another element for which the atomic number = 5Z,by what factor is the wavelength of the K-alpha x-ray line changed?
A) 1/25
B) 1/5
C) 1
D) 5
E) 25

Question

If a target element with atomic number Z used in the production of x-rays is replaced by another element for which the atomic number = 5Z,by what factor is the wavelength of the K-alpha x-ray line changed?
A) 1/25
B) 1/5
C) 1
D) 5
E) ​25

Quizplus · Accepted Answer

The wavelength of the K-alpha x-ray line is inversely proportional to the square of the atomic number (Z) of the target element. If the atomic number is increased by a factor of 5, the wavelength decreases by a factor of 5^2 = 25. Thus, the wavelength changes by a factor of 1/25.

If a Target Element with Atomic Number Z Used in the Production