1.

Figure shown the electron energy level , referred to the ground state (the lowest possible energy) as zero , for five different isoleted atoms. Which atom can produce radiation of the shortest wavelength when atoms in the ground state are bombarded with electrons energy `W`? A. AB. BC. CD. D

Answer» Correct Answer - B
From the graphs given , atom in graph `B` will absorb must of the energy `W` from the electron and re-radiate, in all directions, rediation of shortest wavelength when the atom returns to its ground state.


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