Question

The first emission line of hydrogen atomic spectrum in the Balmer series appears is (R = Rydberg constant)

(a) \(\frac 5{36}\) R cm^-1

(b) \(\frac 34\) R cm^-1

(c) \(\frac 7{144}\) R cm^-1

(d) \(\frac 9{400}\) R cm^-1

Answer 1

Correct option is (a) \(\frac 5{36}\) R cm^-1

For the first emission line in the atomic spectrum of hydrogen in the Balmer series n₁ ​= 2 and n₂​ = 3;

The wavenumber is given by the expression

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at \(\frac 5{36}\) R cm^-1.