H2P-593

Energy levels and line spectra

H2 Physics · JC 2 · Hard · Energy levels and line spectra

Electrons are accelerated from rest through a potential difference of 12.0 kV before striking a metal target to produce X-rays. What is the shortest possible wavelength of the X-rays produced?
(Take Planck constant as

6.63\times10^{-34}\,\text{J s}

, speed of light as

3.0\times10^{8}\,\text{m s}^{-1}

, and

e = 1.60\times10^{-19}\,\text{C}

$1.0\times10^{-10}\,\text{m}$
$3.1\times10^{-11}\,\text{m}$
$6.6\times10^{-10}\,\text{m}$
$1.9\times10^{-15}\,\text{m}$

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