Question

This energy diagram shows the allowed energ SI prefix 'zepto' means 10^-21. 

Use this diagram to complete the table below. 

What is the energy of the electron in the ground state? 

What is the energy of the electron in the first excited state? 

If the electron makes the transition shown by the red arrow, from B to A, will a photon be absorbed or emitted? 

Calculate the wavelength of the photon that would be absorbed or emitted. 

Answer 1