Which of the following series of hydrogen falls in the infrared region?

اورکت خطے میں ہائیڈروجن کی مندرجہ ذیل سیریز میں سے کون سا سلسلہ آتا ہے؟

Pfund

Lyman

Balmer

None of these

Explanation

The Pfund series consists of hydrogen spectral lines that fall in the infrared region, with electron transitions to the fifth energy level (n = 5).

Other series:

Lyman (UV, n = 1)
Balmer (Visible, n = 2)
Brackett (Infrared, n = 4)