The minimum wavelength of X-rays produced by an electron accelerated through a potential difference of $V$ vol

Question

The minimum wavelength of X-rays produced by an electron accelerated through a potential difference of $V$ volts is proportional to

Accepted Answer

The energy of the electron is $eV = \frac{hc}{\lambda_{min}}$. Therefore, $\lambda_{min} = \frac{hc}{eV}$. Since $h, c, e$ are constants, $\lambda_{min} \propto \frac{1}{V}$.

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