Question

In Moseley's law $\sqrt{v}=a(z-b)$, then choose correct option

• A. $a$ depends on target material
• B. $b$ is independent of target material
• C. $v$ depends on tube voltage
• D. $z$ is independent of target material

Answer 1

The correct option is B $b$ is independent of target material

$\sqrt{v}=a(z-b)$
$\sqrt{v}=\sqrt{\frac{3}{4}RC}(z-1)$
both $a$ and $b$ are constant and hence independent of target.

$v$ is characteristic $x$ -ray frequency which depends on $a,b,z$.

$z$ is atomic number, so it depends on the material.