emissivity
Surface radiation coefficient
Emissivity is a measure of how effectively a surface radiates thermal energy compared to an ideal blackbody.
A perfect emitter has an emissivity of 1; a perfect reflector has an emissivity of 0.
The property matters in thermal imaging, building insulation, and climate science: Low-emissivity windows reduce heat loss in winter.
Perfect thermal emitter
- absorptivityFraction of light taken in
- reflectivityLight-bouncing capacity
- transmissivityFlow capacity through medium
- thermal radiationElectromagnetic waves from temperature
Remote high-temperature measurer
- thermographyHeat-based diagnostic scanning
- infrared cameraDevice photographing heat emissions
- thermal imagingDetecting objects by warmth
- spectroscopyStudy of light-matter interaction
radiometer · calibration · reference standard · non-contact · temperature measurement · surface temperature
Applied surface covering
- oxidationLosing electrons chemically
- polishedSmooth, refined, accomplished
- roughnessUneven surface quality
- paintColored coating substance
anodized · matte · glossy · ceramic · metal · carbon black · thin film · composite
Material reducing heat transfer
- solar collectorSurface gathering radiant energy
- kilnOven for hardening clay
- stealth technologySensor-evading military engineering
- satelliteOrbiting celestial body
blackbody
Perfect thermal emitter
- absorptivityFraction of light taken in
- reflectivityLight-bouncing capacity
- transmissivityFlow capacity through medium
thermal radiation · pyrometer · thermal equilibrium · monochromatic
pyrometer
Remote high-temperature measurer
- thermographyHeat-based diagnostic scanning
- infrared cameraDevice photographing heat emissions
- thermal imagingDetecting objects by warmth
spectroscopy · radiometer · calibration · reference standard · non-contact · temperature measurement · surface temperature
coating
Applied surface covering
- oxidationLosing electrons chemically
- polishedSmooth, refined, accomplished
- roughnessUneven surface quality
paint · anodized · matte · glossy · ceramic · metal · carbon black · thin film · composite · refractory
building insulation
Material reducing heat transfer
- solar collectorSurface gathering radiant energy
- kilnOven for hardening clay
- stealth technologySensor-evading military engineering
- heatheat transfer, thermal energy, heatwave, radiation, convection
- thermal sensingthermometer, thermal camera, infrared sensor, temperature sensor, thermal imaging
- Radiometryradiance, radiant energy, irradiance, radiometer, fluence
- heat transferconduction, convection, heat flow, heat transfer, conductors
- remote sensingsatellite imagery, aerial photography, LIDAR, LiDAR, radar imaging
- Thermal Radiationthermal radiation, radiant heat, infrared radiation, infrared, blackbody
emissivityreflectivity
Light-bouncing capacity
reflectance · absorptivity · albedo · opacity · transmissivity
admit, emit, emission, submissive, admits, emissary, admittedly, remittance, emits