1.

The transition from the state n=4 to n=3 in a hydrogen-like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition

A.  \[2\to 1\]
B.  \[3\,\to 2\,\]
C.  \[4\to 2\]
D.  \[5\to 2\]
Answer» E.


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