The waves emitted when a metal target is bombarded with high energy electrons are

An $X$-ray tube is operated at $1.24$ million volts. The shortest wavelength of the produced photon will be ..... $nm$.

The intensity of $X$-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is ${\lambda _c}$ and the wavelength of the ${K_\alpha }$ line is ${\lambda _k}$. As the accelerating voltage is increased:

The difference between soft and hard $X-$rays is due to their:

Hydrogen atom does not emit $X$-rays because

$X$-rays of which of the following wavelengths are hardest? (in $\mathring{A}$)