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Question: The ionization energy of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by...

The ionization energy of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by electromagnetic radiation of energy 12.1 eV. How many spectral lines will be emitted by the hydrogen atoms ?

A

1

B

2

C

3

D

4

Answer

3

Explanation

Solution

Number of spectral lines

= n(n−1)2=3(3−1)2=3\frac{n(n - 1)}{2} = \frac{3(3 - 1)}{2} = 3