Value of ni in Pfund series is:
Correct answer: D. 5
- A. 1
- B. 2
- C. 4
- D. 5
Explanation
The value of ni in the Pfund series is 5. In the hydrogen spectrum, the Pfund series corresponds to electron transitions to and from the n = 5 energy level (where ni, the initial energy level, is 5). The lines in the Pfund series are typically found in the infrared part of the spectrum that are emitted when an electron in an atom falls from an outer orbit to the fifth orbit. The name of this series is derived from the name of August Herman Pfund, who first observed the series in 1912.
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