A) 24.6eV
B) 79.0 eV
C) 54.4 eV
D) None of these
Correct Answer: B
Solution :
The total energy required to make the electron free from nucleus is the sum of the energy required to separate the electrons from the influence of each other and the energy required to separate the electrons from the influence of nucleus, i.e., Total energy required = BE of electron in \[\phi '\] atom + lonization energy of He-atom \[\tan \,\phi =\frac{V}{{{H}^{.}}}=\frac{V}{H\,\cos \,\theta }\] \[\frac{\tan \,\phi '}{\tan \,\phi }=\frac{V/H\,\cos \,\theta }{\frac{V}{H}}=\frac{1}{\cos \,\theta }\]
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