Find the maximum frequency, the X-ray emitted by an X-ray tube operating at `30 kV`

Explanation

For maximum frequency, the total kinetic energy `(eV)` should be converted into a X-ray photon. Thus
`hv = eV`
or, `v = e/h V`
or , `= (e xx 30 xx 10^3 V)/(4.14 xx 10^(-15) eV-s)`
`= 30/(4.14) xx 10^(18) Hz = 7.2 xx 10^(18) Hz`