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Iron emits `K_alpha` X-ray of energy 6.4 keV and Calcium emits `K_alpha` X-ray of energy 3.69 keV. Calculate the times taken by an iron `K_a` photon a

Monjur Alahi

Iron emits `K_alpha` X-ray of energy 6.4 keV and Calcium emits `K_alpha` X-ray of energy 3.69 keV. Calculate the times taken by an iron `K_a` photon and a calcium `K_a` photon to cross through a distance of 3 km.


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Salim Ahmed Kawsar

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Correct Answer - [10 us by both]

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