Laser is a device to produce___________________?
Correct answer: C. A beam of coherent light
- A. Gamma rays
- B. Microwaves
- C. A beam of coherent light
- D. A beam of white light
Explanation
A laser uses stimulated emission to generate light waves having a fixed phase relationship, giving a coherent beam. Gamma rays and microwaves are different regions of the electromagnetic spectrum, while ordinary white light is incoherent.
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