On a heavy atom electrons are fired with kinetic energy E. If binding energy of electrons in this atom corresponding to K, L and M shells are 40.2 keV, 21.8 keV and 11.5 keV respectively, what should

Question

On a heavy atom electrons are fired with kinetic energy E. If binding energy of electrons in this atom corresponding to K, L and M shells are 40.2 keV, 21.8 keV and 11.5 keV respectively, what should be the minimum value of E to produced $L_{α}$ X-ray from the atom :

Options:

Answer:

B

Solution:

$L_{α}$ emission needs a vacancy in the L shell. Creating it needs $E \geq$ L-shell binding energy $= 21.8 keV$ .

TestHub · Accepted Answer

L α ​ emission needs a vacancy in the L shell. Creating it needs E ≥ L-shell binding energy = 21.8 keV .

Physics - Modern Physics Question with Solution | TestHub

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