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 = 3Z,by what factor is the wavelength of the K-alpha x-ray line changed?
A)1/9
B)1/3
C)3
D)9

Question

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 to 3Z, the wavelength becomes (1/(3Z)^2) = 1/9 of the original wavelength.

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