When a metal target is bombarded with high-energy electrons,the electromagnetic waves generated are

The shortest wavelength of $X$-rays emitted from an $X$-ray tube depends on the

The typical wavelength of $X$-ray is

$X$-rays of wavelength $22 \, pm$ are scattered from a carbon target at an angle of $85^{\circ}$ to the incident beam. The Compton shift for $X$-rays is ......... $pm$.

The structure of solids is investigated by using

The largest distance between the interatomic planes of a crystal is $10^{-7} \text{ cm}$. The upper limit for the wavelength of $X$-rays which can be usefully studied with this crystal is ............ $\mathring{A}$.