Question

Moseley's law for characteristic X-ray is $\sqrt{f}=a(Z-b)$. In this,

• A. Both a and b are independent of the material.
• B. a is independent but b depends on the material.
• C. b is independent but a depends on the material.
• D. Both a and b depend on the material.

Answer 1

The correct option is A Both a and b are independent of the material.

The constants a and b are known as:
$b\approx 1$
and
$a=\sqrt{\frac{3Rc}{4}}$
Hence both a and b are independent of the material.