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What device emits light , which is usually spatially coherent, through a process called stimulated emission?

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What device emits light (electromagnetic radiation), which is usually spatially coherent, through a process called stimulated emission?

ANeon tube
BLaser
CIncandescent bulb
DPlasma screen

Correct Option: 2  

Explanation:
Laser
The term laser is an acronym for Light Amplification by Stimulated Emission of Radiation.
posted Jul 16, 2018 by Prachi Sharma

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