If I have, lets say, light of 70nm wavelength. I should be able to calculate the energy like this:(adsbygoogle = window.adsbygoogle || []).push({});

[itex]E_p = h\nu = \frac{hc}{\lambda}[/itex]

Now, if the photon ionize a hydrogen atom. Can can I calculate the electron speed using. [itex]E_e = \frac{mv^2}{2}[/itex] And say that the energy is preserved in the process?

[itex]E_e = E_p[/itex]

[itex]\frac{m_ev^2}{2} = \frac{hc}{\lambda}[/itex]

Wish gives the speed:

[itex]v = \sqrt (\frac{2}{m_e} \frac{hc}{\lambda} )[/itex]

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# Electron after ionizion

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