Which of the following diagrams most correctly represents the structure of the electron energy levels in the atoms of the active medium of a laser?
Which of the following most correctly describes the quality of the active medium of a laser that is relevant to its ability to produce lasing?
The diagrams shown represent three successive stages of the production of photons in a laser.
In which diagram is energy being supplied to the active medium of the laser?
The energy supplied to the active medium of the laser consists of photons with a range of wavelengths. Which of the following fractions of the photons shown in the diagram results in stimulated emission in the laser?
How many photons are produced by the lasing process in the diagrams?