Question

The laser pointer emits light because electrons in the material are excited (by a battery) from their ground state to an upper excited state. When the electrons return to the ground state, they lose the excess energy in the form of 520-nm photons. What is the energy gap between the ground state and excited state in the laser material

Answer 1

Step-by-step explanation:

the energy gap between the ground state and excited state in the laser material will be equal to energy of photons emitted

Wave length of photons = 520 nm

Energy = 1244 / 520 e V ( Formula for conversion of wavelength in nm to energy in eV )

= 2.4 e V

the energy gap between the ground state and excited state in the laser material = 2.4 e V