Chapter 7, Problem 27QP

Interpretation Introduction

Interpretation:

The number of photons emitted when an electron moves directly from the $n=5$ to $n=2$ orbit is to be determined.

Concept Introduction:

According to Bohr’s model, transitions between the allowed orbits cause absorption or emission of energy in the form of photons.

When an electron moves from a higher energy orbit to a lower energy orbit, a photon is emitted. When an electron moves from a lower energy orbit to a higher energy orbit, a photon is absorbed.