Astrophysics (index)

Wavelength

(an alternative description of an electromagnetic wave's frequency or photon energy)

Wavelength is the length of a wave, the distance to the point where the disturbance in a medium begins repeating itself. It has this relationship with wave speed and Frequency:

 wavelength × frequency = wave speed

Thus, an Electromagnetic (EM) wave can be uniquely characterized by wavelength or frequency and also by photon energy which is directly related to frequency.

Wavelength is typically used to describe Microwave, Infrared (IR), and Visible Light. Radio is more likely to be described by frequency and X-ray and Gamma Rays more likely to be described by photon energy.


(EMR,measure,wave)
http://en.wikipedia.org/wiki/Wavelength

Referenced by:
Absorption
Airy Disk
Atacama Large Millimeter Array (ALMA)
Angstrom (Å)
Angular Resolution
Asteroseismology
Astronomical Quantities
B
Balmer Jump
Balmer Series
Balmer-Break Galaxy (BBG)
Biofluorescence
Bolometric Luminosity
Brackett Series
CCAT
Cherenkov Radiation
Cosmic Microwave Background (CMB)
Carbon Monoxide (CO)
Cold Gas
Color Index
Compton Scattering
Continuous Absorption
Continuum Emission
Correlator
Doppler Shift
Double-Line Spectroscopic Binary
Extragalactic Background Light (EBL)
Extremely Low Frequency (ELF)
Emission
Emission Line
European Southern Observatory Very Large Telescope (ESO VLT)
Euclid
Extreme Ultraviolet (EUV)
Extinction
Far Infrared (FIR)
Focal Plane
Frequency
Gamma Rays
Galactic All-Sky Survey (GASS)
G Band
Giant Metrewave Radio Telescope (GMRT)
Grating
Gamma-Ray Burst (GRB)
Grism
Gunn-Peterson Trough
H-alpha (Ha)
Hubble Deep Field (HDF)
Imaging Fourier Transform Spectroscopy (IFTS)
Imaging Spectrometer
Infrared (IR)
Intensity
Interferometer
Interferometry
KMOS
Lyman-Break Galaxy (LBG)
Light Curve
Line Broadening
Line Shape Function
Large Millimeter Telescope (LMT)
Lyman Alpha (Ly-α)
Lyman Series
Maser
Mass Spectrometer
Microwave
Mid Infrared (MIR)
Monochromatic Luminosity
Near Infrared (NIR)
New Worlds Mission
1.3mm Observation
Opacity
Optical Depth (τ)
Origins Space Telescope (OST)
Parkes Observatory
Paschen Series
Passband
Phase Curve
Photoionization
Photometric System
Photosphere
Planck Function
Radiance
Radiant Flux
Radiative Transfer (RT)
Radio
Rayleigh Scattering
Redshift (z)
Rest Wavelength
Rosseland Mean Opacity
SCUBA
Spectral Energy Distribution (SED)
Sensitivity Function (S)
SIMSTACK
Super Low Frequency (SLF)
Software Telescope
Source Function (S)
Spectral Power Distribution (SPD)
Spectral Band
Spectral Flux Density (S)
Spectral Index (α)
Spectral Line
Spectral Resolution (R)
Spectrometer
Spectrometry
Spectroscope
Spectroscopy
Spektr-R
SPHEREx
Spitzer Space Telescope (SST)
Synchrotron Self-Compton (SSC)
Star Formation (SF)
Stellar Temperature Determination
Strömgren Photometric System
Submillimeter Astronomy
Subaru XMM-Newton Deep Survey (SXDS)
Thomson Scattering
Tomographic Ionized-Carbon Mapping Experiment (TIME)
Tremendously Low Frequency (TLF)
Transiting Planet
TripleSpec (TSpec)
U
Ultra Low Frequency (ULF)
Ultraviolet (UV)
V
Visible Light
Very Large Array (VLA)
Very Long Baseline Array (VLBA)
Very Low Frequency (VLF)
Vegetation Red Edge (VRE)
Wien's Displacement Law
Atmospheric Window
Wide-Field Infrared Survey Explorer (WISE)
XEUV
X-ray
Young Stellar Object (YSO)
Zeeman-Doppler Imaging (ZDI)

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