Which of the following statements is true of a laser cavity?
A) A laser cavity consists of four mirrors.
B) All the mirrors in a laser cavity are fully reflective mirrors.
C) In a laser cavity, the first photon hits one of the mirrors and bounces back to pass through the lasting medium again.
D) A chain reaction produces a large number of photons that circulate outside a laser cavity.
E) In a laser cavity, the wavelength of the first photon is different from the wavelengths of the other photons.

Question

Quizplus · Accepted Answer

In a laser cavity, the first photon generated by the stimulated emission of radiation indeed hits one of the mirrors and is reflected back through the lasing medium. This process amplifies the light through stimulated emission, where the photon stimulates the emission of another photon with the same phase, frequency, direction, and polarization, leading to a coherent light beam characteristic of lasers.

Which of the Following Statements Is True of a Laser