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Question

The first spectral line in the Pfund series of Hydrogen spectrum is given by (RH = Rydberg constant) :

  1. 11RH900
  2. 56RH36
  3. 7RH144
  4. 9RH400

A
11RH900
B
56RH36
C
7RH144
D
9RH400
Solution
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A series of wavenumber in the Pfund series of the Hydrogen spectrum is given by RH[1521n2], where RH is the Rydberg constant for hydrogen and n is an integer greater than 5.

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