Notes &
Achtung! Test safety of laser pointers with paper cups, webcam
In recent years, handheld green lasers have become the hardware of choice for everything from delivering lectures to entertaining cats, in part because the human eye detects their light more efficiently than their red counterparts. But researchers at the National Institute of Standards and Technology (NIST) have found that shoddy manufacturing processes can result in these lasers emitting up to ten times as much infrared light as they produce in the visible spectrum, creating a potential hazard.
