1.

The frequency of radiation emitted when the electron falls from \[n=4\] to \[n=1\] in a hydrogen atom will be (Given ionization energy of H\[=2.18\times {{10}^{-18}}J\,\,\,\text{ato}{{\text{m}}^{-1}}\]and \[h=6.625\times {{10}^{-34}}Js\])                                                [CBSE PMT 2004]

A. \[3.08\times {{10}^{15}}{{s}^{-1}}\]
B. \[2.00\times {{10}^{15}}{{s}^{-1}}\]
C. \[1.54\times {{10}^{15}}{{s}^{-1}}\]
D. \[1.03\times {{10}^{15}}{{s}^{-1}}\]
Answer» B. \[2.00\times {{10}^{15}}{{s}^{-1}}\]


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