Question

Of the following transitions in hydrogen atom, the one which gives an absorption line of lowest frequency is

• A. n=1 to n=2
• B. $n = 3$ to $n = 8$
• C. $n = 2$to$n = 1$
• D. $n = 8$ to $n = 3$

Answer 1

Answer: (B)

$n = 3$ to $n = 8$

Answer 2

Absorption line in the spectra arise when energy is absorbed i.e., electron shifts from lower to higher orbit, out of a & b, b will have the lowest frequency as this falls in the Paschen series.