Intensity of $X-$rays depends upon the number of

Moseley's law for characteristic $X$-rays is given by $\sqrt{f} = a(Z - b)$. Choose the correct statement.

$X-$rays are in nature similar to

The patient is asked to drink $BaSO_4$ for examining the stomach by $X$-rays because $X$-rays are

The structure of solids is investigated by using

If the voltage of an $X$-ray tube is doubled,the intensity of $X$-rays will become