Lots More InformationRelated HowStuffWorks Articles
- How Light Works
- How Lasers Work
- What is the difference between a fluorescent light and a neon light?
- How does glow-in-the-dark stuff work?
- How far does ultraviolet light penetrate into the body?
What makes sound a weapon? Review the basics of sound and discover exactly how the LRAD produces its "beam of sound." We'll also explore LRAD's hailing and warning abilities and other uses for sound.
Twenty-seven kilometers is more than five 5K races. Most humans aren't interested in running that much, so why do a bunch of speeding protons require that considerable distance?