# An electron in a hydrogen atom drops from energy level n=5 to n=3. What is the energy transition using the Rydberg equation?

##### 2 Answers

The energy transition will be equal to

So, you know your energy levels to be **n = 5** and **n = 3**. **Rydberg's equation** will allow you calculate the wavelength of the photon emitted by the electron during this transition

**3**;

**5**.

So, you've got all you need to solve for

Since

So, the transition energy for your particular transition (which is part of the **Paschen Series**) is

A photon of energy

The Rydberg expression for an electronic transition in the hydrogen atom is:

So:

The energy of the photon given by this transition is given by:

Since

So: