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An X-ray pulse of wavelength 4.9Å is sen...

An X-ray pulse of wavelength 4.9Å is sent through a section of Wilson cloud chamber containing a super saturated gas, and tracks of photoelectrons ejected from the gaseous atom are observed. Two groups of tracks of length 1.40cm and 2.02 cm are noted. If the range-energy relation for cloud chamber is given by `R=alphaE`, with `alpha=1cm//keV`, obtain the binding energies of two levels from which electrons are emitted. Given `h=6.63xx10^(-34)Js , e=1.6xx10^(-19)C`.

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