WBJEE · Chemistry · Structure of Atom
The emission spectrum of hydrogen discovered first and the region of the electromagnetic spectrum in which it belongs, respectively are
- A Lyman, ultraviolet
- B Lyman, visible
- C Balmer, ultraviolet
- D Balmer, visible
Answer & Solution
Correct Answer
(D) Balmer, visible
Step-by-step Solution
Detailed explanation
In 1885 , Balmer for the first time showed that the wave numbers of spectral lines present in the visible region in hydrogen spectrum are given by \[ \bar{v}\left(\mathrm{cm}^{-1}\right)=109677\left(\frac{1}{(2)^{2}}-\frac{1}{n^{2}}\right) \] Here, \(n=3,4,5, \ldots\) Thus,…
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