An \(X\text-\)ray tube produces a continuous spectrum of radiation with its short wavelength ending at  \(0.45~ \mathring{A}. \) What is the maximum energy of a photon in radiation?
1. \(27.6~ \text {keV} \)
2. \(25.5 ~\text {keV} \)
3. \(23.4 ~\text {keV} \)
4. \(25.1~ \text {keV}\)