A Question $9(1$ point$)$ Retake question

X$-$rays produced by the traditional X$-$ray lamp have cut$-$off wavelength of $2\mathrm{.}45nm.$

Find the accelerating potential used in this lamp.

Take Planck's constant to be $h={6\mathrm{.}626}^{**}{10}^{-34}J*s,$ the speed of light to be $c=$

$3^{**}{10}^8\frac{m}{s},$ and $1eV={1\mathrm{.}602}^{**}{10}^{-19}J.$

Give your answer in volts to the nearest $1$V$.$

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