photometry
Quantifying light intensity
Photometry is the science of measuring light as perceived by the human eye, distinct from radiometry, which measures all electromagnetic radiation.
Astronomers use photometry to determine the brightness of stars and other celestial objects: The team used photometry to detect the planet's transit across its star.
In photography and lighting design, photometry quantifies illumination levels to ensure proper exposure or adequate lighting.
Intrinsic brightness of source
- magnitudeSize or scale
- spectrophotometryMeasuring light wavelength absorption
- stellarOf or like celestial bodies
- fluxContinuous change or flow
brightness · CCD · extinction · calibration · bandpass · filter
Provision of light
- luminanceLight per unit area
- brightnessDegree of light emitted
- intensityStrength or force level
- lampElectric light fixture
LED · fixture · distribution · uniformity · glare · contrast · reflectance · transmittance
SI illuminance unit
- lumensMeasure of visible light
- candelaLuminous intensity unit
- illuminanceReceived light intensity
- nitParasite egg or quibble
colorimetry · detector · sensor · calibration · standardization · accuracy · precision · uncertainty
Solar radiation received
- irradianceIncident power per area
- heliostatSun-tracking mirror device
- sunshineDirect rays from above
- daylightSun's natural glow
luminosity
Intrinsic brightness of source
- magnitudeSize or scale
- spectrophotometryMeasuring light wavelength absorption
- stellarOf or like celestial bodies
flux · brightness · CCD · extinction · calibration · bandpass · filter
illumination
Provision of light
- luminanceLight per unit area
- brightnessDegree of light emitted
- intensityStrength or force level
lamp · LED · fixture · distribution · uniformity · glare · contrast · reflectance · transmittance · scotopic
lux
SI illuminance unit
- lumensMeasure of visible light
- candelaLuminous intensity unit
- illuminanceReceived light intensity
nit · colorimetry · detector · sensor · calibration · standardization · accuracy · precision · uncertainty
insolation
Solar radiation received
- irradianceIncident power per area
- heliostatSun-tracking mirror device
- sunshineDirect rays from above
daylight · atmosphere · albedo
- astronomystars, moon, sun, planet, planets
- stargazingtelescope, stargazing guides, night sky, stars, constellation
- Light Sciencelight source, light sources, light intensity, light spectrum, wavelength
- opticslens, lenses, mirror, mirrors, prism
- astronomy dataephemeris, star maps, sky maps, astronomical tables, astrometry
- Lab Analysisspectrometer, spectrophotometry, spectroscopy, colorimeter, absorbance
photometryspectroscopy
Study of light-matter interaction
spectrometry · spectral analysis · colorimetry · interferometry · spectrophotometry