Question

1. Laser pumping is

1. The mechanism for reflecting laser light back and forth
2. The mechanism for exciting many electrons to high energy levels
3. The mechanism for extracting light out of the laser cavity
4. None of the above
5. Laser pumping is
6. The mechanism for reflecting laser light back and forth
7. The mechanism for exciting many electrons to high energy levels
8. The mechanism for extracting light out of the laser cavity
9. None of the above

Answer 1

Laser pumping is the process in which the energy is given to the electrons so that they go to higher excited state to achieve population inversion which is necessary condition for the emission of laser. So in nut shell we pump the electrons or we can say we provide them energy to excite them to higher energy levels. As when they come back they emit laser by the process of stimulated emission. Hence option B is the correct answer.

Kindly note that the options have been repeated so take care of that.

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