1. Are lasers dangerous?
Yes, lasers can be dangerous if not handled correctly. The two main risks are eye injuries and skin burns. Even low-power lasers, like those found in laser pointers, can cause permanent eye damage within a fraction of a second if directly viewed. The retina can be burned, leading to permanent vision impairment or blindness.
- Visible and Near-Infrared Lasers (400-1400 nm): These can penetrate the eye, directly damaging the retina.
- Infrared Lasers: Particularly dangerous as they don’t trigger the natural blink reflex, making accidental exposure harder to prevent.
- High-Power Lasers: These can cause severe skin burns and tissue damage, much like a focused heat source.
Key takeaway: Lasers, while useful, carry significant risks if improperly used. Understanding these risks is essential for safe operation.