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 537-nm photons. What is the energy gap between the ground state and excited state in the laser material?

Answer 1

E= 3.497×10^(-19) J

Step-by-step explanation:

The energy gap between ground and the excited state will be equal to energy of a photon of wavelength 537 nm

which can be calculated as

`E= (hc)/(\lambda)`

h= Planck's constant

λ= wavelength of photon

c= speed of light

`E= (6.626* 10^(-34)*3*10^8)/(\537*10^(-9))`

E= 3.497×10^(-19) J