NEET-XII-Physics
qstns with ansrs year:2022
- #34Let `` T _{1} `` and `` T _{2} `` be the energy of an electron in the first and second excited states of hydrogen atom, respectively. According to the Bohr's model of an atom, the ratio `` T _{1}: T _{2} `` is :
(A) `` 9: 4 ``
(B) `` 1: 4 ``
(C) `` 4: 1 ``
(D) `` 4: 9 ``digAnsr: AAns : First excited state `` \Rightarrow n =2 ``
`` T _{1}=-13.6 \frac{ z ^{2}}{ n ^{2}}=-\frac{13.6}{4} eV ``
Second excited state `` \Rightarrow n =3 ``
`` T _{2}=-13.6 \frac{ z ^{2}}{ n ^{2}}=-\frac{13.6}{9} eV ``
`` T _{1}: T _{2}=\frac{1}{4}: \frac{1}{9}=9: 4 ``