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Question

When an excited hydrogen atom returned to its ground state, some visible quanta were observed along with other quanta. Which of the following transitions must have occured?


A
21
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B
31
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C
41
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D
51
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Solution

The correct option is B $$2\rightarrow 1$$
The transition $$2\rightarrow 1$$ must have occurred.
This is because the visible quanta are observed in the Balmer series when the electron de-excites by the transition from higher level to the second level. Once the electron reaches the second level, it will de-excite to ground state which will result in the transition $$2\rightarrow 1$$. The quanta emitted will now be in UV region.

Physics

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