Applications of GMR GMR sensors find a wide range of applications: Fast and accurate position and motion sensing of mechanical components in precision engineering and robotics. Missile Guidance Position and motion sensing in computer video games. Key Hole Surgery and post operative care.
Ultraviolet Light Ultraviolet (UV) light is light with higher frequency (lower wavelength) than visible light. UV light has frequencies ranging from 8*10 14 to 3*10 16 Hz (800 THz to 30 PHz) and wavelengths from 10 -8 m to 3.8*10 -7 m (10 nm to 380 nm).
I thought that since UV light has more energy than visible light and N2 can absorb only energy from UV light, then the energy from the visible light is inadequate for exciting it. I2 molecules absorb both visible and uv light successfully, so they require less energy to excite. I know... this is a half-baked guess.