Chemistry

Problem

When an electron in a hydrogen atom makes a transition from an initial level

n_i

to a lower level

n_f\,(n_i>n_f)

, which of the following relations correctly gives the wavelength

\lambda

of the photon emitted in terms of the Rydberg constant

R_H

? a)

\dfrac{1}{\lambda}=R_H\left(\dfrac{1}{n_f}-\dfrac{1}{n_i}\right)

\dfrac{1}{\lambda}=R_H^{2}\left(\dfrac{1}{n_f^{2}}-\dfrac{1}{n_i^{2}}\right)

\dfrac{1}{\lambda}=R_H\left(\dfrac{1}{n_f^{2}}-\dfrac{1}{n_i^{2}}\right)

\dfrac{1}{\lambda}=R_H\left(\dfrac{1}{n_i^{2}}-\dfrac{1}{n_f^{2}}\right)