Light and photon energy Transitional Reasoning Download PDF

Questions

1. 1.

   A laboratory technician uses two monochromatic light sources, Laser A ($\lambda = 400\text{ nm}$) and Laser B ($\lambda = 800\text{ nm}$), to examine electron excitations in a gas cell. Laser B is configured to deliver twice the total radiant power (energy per second) of Laser A. Based on the relationship between light wavelength, photon energy, and beam power, which comparison between the two laser beams is correct?

   • A) Each photon from Laser B carries twice the energy of a photon from Laser A, and both lasers emit photons at the same rate.
   • B) Each photon from Laser A carries twice the energy of a photon from Laser B, while Laser B emits photons at four times the rate of Laser A.
   • C) Each photon from Laser A carries four times the energy of a photon from Laser B, while both lasers emit photons at the same rate.
   • D) Each photon from Laser B carries half the energy of a photon from Laser A, while Laser B emits photons at twice the rate of Laser A.