Lasers are intensely focused beams of light. the light doesn't have much to scatter off of, and therefore it doesn't hit our eyes. If we introduce something to the laser, something with more particles for the light to scatter and bounce off of, more light particles will hit our eyes and we will be able to see it.




This movie is in Quick Time format. If you need a plug-in to view it, you can get it here.




© 2002 Everyday Science, Poudre School District