I made some significant improvements to my ruby laser: now it burns holes through steel razor blades and makes a plume of fire when striking targets containing a high percentage of carbon. The beam is visible, although it is at the edge of the visible spectrum and therefore does not appear particularly bright to the eye. It also does not scatter as noticeably from dust and smoke as do visible lasers with shorter wavelengths (like green or blue).

More detail with much clearer pictures can be found on my Flickr site at:

[ Ссылка ]

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