A new result from Purdue https://www.purdue.edu/newsroom/releases/2021/Q2/the-whitest-paint-is-here-and-its-the-coolest.-literally..html
Is about the development of a new paint that is the whitest yet, reflecting 98.1% of solar radiation. That is so much that they claim that it causes a...
"Photons do not “gain energy” in a laser. They cause more photons to be released as they pass through the cavity.". sure that was sloppy wording on my part.
As for you other comment, I'm not sure what you mean by a "better explanation". I could have pheased the question as to how many...
So (wildly simplistically) lasers work by photons being reflected between mirrors gaining energy on each trip through the medium until they break through the mirror on the output end. How many trips does that typically result in? 10s, millions? And thus the total distance is that count * the...