TONY MCCONNELL / SCIENCE PHOTO LIBRARY TONY MCCONNELL / SCIENCE PHOTO LIBRARY
Patio heater. Thermogram of a patio heater glowing and warming its surroundings. Thermography records surface temperatures by detecting the long-wavelength radiation emitted by an object. Here, the colour-coded temperature scale runs from white (warmest) through pink, red, orange, yellow, green and blue to black (coldest).
Model release not required. Property release not required.