Photons in a laser beam have the same energy, wavelength, polarization direction, and phase because:
A)each is produced in an emission that is stimulated by another
B)all come from the same atom
C)the lasing material has only two quantum states
D)all photons are alike, no matter what their source
E)none of the above

Question

Quizplus · Accepted Answer

In a laser beam, the photons all have the same energy, wavelength, polarization direction, and phase because they are produced through stimulated emission, where an incoming photon triggers the emission of another identical photon from an excited atom. This process ensures that all the emitted photons are identically matched in their properties.

Photons in a Laser Beam Have the Same Energy, Wavelength