STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Light bulb filament, coloured scanning electron micrograph (SEM). An electrical current flows through the tungsten filament (yellow) from the blue wire. The current heats the filament, which glows white hot. The green wire is a support wire. Magnification: x5 when printed at 10 centimetres wide.
Model release not required. Property release not required.