Question: Q. 3. (i) Using Bohr’s postulates, derive the expression for the total energy of the electron in the stationary states of the hydrogen atom.
U] [Foreign, OD Comptt. I, II, III 2014;
Delhi I, II, III 2013]
(ii) Using Rydberg formula, calculate the wavelengths of the spectral lines of the first member of the Lyman series and of the Balmer series.
[Foreign 2014]
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Solution:
Ans. (i) } \quad
(ii) Rydberg formula : For first member of Lyman series
For first member of Balmer Series
[CBSE Marking Scheme 2014]