Question

An electron in an infinite one-dimensional potential well jumps from the n=3 energy level to the ground state energy level and in doing so emits a photon of wavelength 20.9 nm. What is the width of the well?
Assume electron mass =9.11e−31 kg, h=6.626e−34 J.s and c=3e8 m/s.

Answer 1

Hi.

Wonderful Question from the wave Optics.

A Solution is shown in the attachment.

Electron is jumping from 3 to 1 this means the Lymen series of spectral lines is formed because electrons came to 1st orbit.

In the Attachment, all the calculations have been done and the correct formula are used for the Better understanding.

Hope it helps.

Answer 2

Electron is jumping from 3 to 1 this means the Lymen series of spectral lines is formed because electrons came to 1st orbit.