spectrograph
Wavelength recording instrument
A spectrograph is an instrument that separates light or other radiation into its component wavelengths and records the resulting spectrum, typically as an image or graph.
Astronomers use spectrographs to analyze starlight and determine a star's composition, temperature, and motion: The spectrograph revealed the presence of hydrogen in the nebula.
Light-splitting optical element
- diffractionWaves spreading past obstacles
- gratingCrossed bars or harsh
- detectorDevice that senses
- CCDLight-sensitive imaging chip
sensor · collimator · slit · calibration · optics · lens · mirror · array
Able to be seen
- infraredHeat-bearing electromagnetic waves
- ultravioletWavelengths shorter than violet
- X-rayPenetrating diagnostic beam
- gamma-rayHighest-energy electromagnetic wave
wavelength · frequency · electromagnetic · bandwidth · continuum · dispersion · near-infrared · broadband
Discharged substance or act
- absorptionProcess of taking in
- identificationEstablishing who someone is
- elementalBasic, of natural forces
- fingerprintFriction ridge impression
peaks · wavelength · intensity · quantitative · qualitative · isotope · plasma · atomic
Of or like celestial bodies
- redshiftWavelength stretch from recession
- blueshiftLight compressed by approach
- exoplanetPlanet outside our system
- starlightLuminance from distant suns
quasar · nebula · galaxy · Hubble · Doppler · supernova · chromosphere · corona
Electromagnetic radiation unit
- refractionWave bending between media
- diffractionWaves spreading past obstacles
- dispersionScattering across space
- luminosityIntrinsic brightness of source
fluorescence · phosphorescence · monochromatic · polychromatic · radiation · interference · coherent · incoherent
prism
Light-splitting optical element
- diffractionWaves spreading past obstacles
- gratingCrossed bars or harsh
- detectorDevice that senses
CCD · sensor · collimator · slit · calibration · optics · lens · mirror · array · resolution
visible
Able to be seen
- infraredHeat-bearing electromagnetic waves
- ultravioletWavelengths shorter than violet
- X-rayPenetrating diagnostic beam
gamma-ray · wavelength · frequency · electromagnetic · bandwidth · continuum · dispersion · near-infrared · broadband · narrowband
emission
Discharged substance or act
- absorptionProcess of taking in
- identificationEstablishing who someone is
- elementalBasic, of natural forces
fingerprint · peaks · wavelength · intensity · quantitative · qualitative · isotope · plasma · atomic · molecular
stellar
Of or like celestial bodies
- redshiftWavelength stretch from recession
- blueshiftLight compressed by approach
- exoplanetPlanet outside our system
starlight · quasar · nebula · galaxy · Hubble · Doppler · supernova · chromosphere · corona
photon
Electromagnetic radiation unit
- refractionWave bending between media
- diffractionWaves spreading past obstacles
- dispersionScattering across space
luminosity · fluorescence · phosphorescence · monochromatic · polychromatic · radiation · interference · coherent · incoherent
- Physics Devicesaccelerometer, ammeter, barometer, calorimeter, gyroscope
- spectroscopyspectrophotometer, XPS, UPS, AES, EPR
- audio analyzersRTA, audio visualizer
- stellar spectroscopyFraunhofer lines, Balmer series, prism, wavelength, Doppler shift
- speech toolsvoice recorder, audiometer, laryngoscope, speech synthesizer, speech recognition
- astronomystars, moon, sun, planet, planets
spectrographnaked eye
Vision without optical instruments
telescope · microscope · magnifying glass · camera · mirror