Physics · Atomic Spectra
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Which of the following is true for Lasers?
- A
Electrons are emitted
- B
Stimulated emission of electrons is needed
- C
Coherent monochromatic light is emitted
- D
There is a population inversion of photons
A and B are incorrect because photons are emitted. D is incorrect because population inversion of atoms is achieved. C is correct because it is true that a laser emits coherent and monochromatic light.
A and B are incorrect because photons are emitted.
A and B are incorrect because photons are emitted.
C is correct because it is true that a laser emits coherent and monochromatic light.
D is incorrect because population inversion of atoms is achieved.
Tagged under Physics · Atomic Spectra · 2011