Laser pointer technology has come a long way over the past few decades. So, an interesting question is what was the first laser pointer you ever had? For many of us, simple low power red laser keychains were the norm. Purchased regularly at flea markets or from street...
For many of us, the first sort of lasers we saw in person were cheap key-chain laser pointers that were available only in red and that had little attachments to make designs. Over the years, technology has changed so dramatically that the variety of lasers we see...