atmospheric windows: Wavelength regions in which Earth's atmosphere is transparent - at visual, infrared, and radio wavelengths.
Atmospheric windows (transparency/opacity)
Wavelength (lambda), frequency (f), c = f × lambda
Photoelectric effect
Photons (particle-like)
Photons carry energy : E = hf = hc/ lambda
h=Planck's constant = 6.6× 10-34 Joules sec.
Atmospheric windows in the electromagnetic spectrum. (Note that the spectrum of colors from red to blue is shown in reverse.)
Image credit: NASA ...
Electromagnetic Spectrum
Atmospheric Windows
Why Observe at Different Wavebands?
Further Information
Questions ...
The response of the human eye is defined by subjective testing (see CIE), but the atmospheric windows are defined by physical measurement.
Any gap in a linear continuum, as atmospheric windows , ranges of wavelengths in the electromagnetic spectrum to which the atmosphere is transparent, or firing windows , ...
Data from space-based observatories like Spitzer, IRAS and ISO help fill in the gaps between the atmospheric windows listed above.
See also
* Far infrared astronomy ...
The sensitivity of Earth-based infrared telescopes is significantly limited by water vapor in the atmosphere, which absorbs a portion of the infrared radiation arriving from space outside of selected atmospheric windows.
 See also: Wavelength, Atmospheric Window, Atmosphere, Earth, Spectrum
  
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