Question

A hydrogen-like atom(atomic number Z) is in a higher excited state of quantum number n. This excited atom can make a transition to the first state by successively emitting two photons of energies 10.20 eV and 17.00 eV. Alternatively, the atom from the same excited state can make a transition to the second excited state by emitting two photons of energies 4.24 eV and 5.95 eV. The atom during transition from n =1 to n = 2 emit radiation in the region of :

• A. Visible
• B. Infra-red
• C. UV
• D. None

Answer 1

Answer: (C)

UV

When $n_1=1$ and $n_2>1$ , then it is called as Lyman series.

It falls under the UV region.
The correct answer is $C$.