Answer to Question #115591 in Physics for tehmina

Question

what is the rate of spontanueus emissio to stimulated emissin in sun? is laser action is possible in sun?

Answer 1

The rate of spontaneous emission to stimulated emission in sun is hard to calculate quantitatively, there are not so much literature on this topic.

"Laser action [in sun] is possible only when atoms and molecules have their energy distributed in certain ways" (Jeff Hecht, 1984) Few atoms in the sun comply with this criterion. Therefore, laser action can be possible in sun for a very short time.

Reference

Jeff Hech, 1984. Beam Weapons: The Next Arms Race, Jeff Hecht.