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

Answer:

E= 3.497×10^(-19) J

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

$E= \frac{hc}{\lambda}$

h= Planck's constant

λ= wavelength of photon

c= speed of light

$E= \frac{6.626\times 10^{-34}\times3\times10^8}{\537\times10^{-9}}$

E= 3.497×10^(-19) J