Question

Write the name of any one device for obtaining coherent Sources.

Answer 1

Answer:

Laser

Explanation:

The atoms in the laser medium are pumped up energetically by an external power source, producing a population inversion of atomic energies. the pumped-up atoms can return to lower energy levels by emitting light at only certain frequencies , depending on a particular medium which can be a solid, liquid or a gas.

I hope this helps...

Answer 2

Answer:

Lasers are commonly used as coherent sources and use a phenomenon called Simulated Emission to generate highly coherent light. Small sources of light are at least partially coherent.