Question

What Is The wave Length and Wave Number of 3line In The balmer Series in Hydrogen spectrum

Answer 1

Explanation:

For 3rd line of balmer series.

n1=2, n2=5

Neubar=1/lambda=R(1/4-1/25)

=R(21/100)

= 109678cm-1×21/100

which is wave number.

wave length (lambda)=100/109678×21

=4.3×10^-5cm-1