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Why does light disperse with distance and what keeps laser light from dispersing? Thanks for comments. Joe L. Ogan
Do you have a preference? Thanks for comments. Joe L. Ogan
In optics the term "dispersion" means separation of frequencies in a medium, that is, the phenomenon you oserve when white light goes through a glass prism. What Ogan talks seems the fact a laser beam "remains tightly focused at large distances" as you wrote.
Quote from: Joe L. Ogan on 14/10/2010 21:22:38Do you have a preference? Thanks for comments. Joe L. OganYes, but just because optics books and physicists have (if it were for me, you could call it as you want).
What is your idea on why a laser beam can stay more tightly focused over a long distance compared to a standard beam of light of equal power over a long distance?