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In Remote Sensing, the places where energy (wavelength) passes with limited or no absorption is called ......

  • A.Rayleigh Scattering
  • B.Raman effect
  • C.Atmospheric window
  • D.Aurora borealis

Answer: C

The answer is Atmospheric window.

Gases such as water vapour, carbon dioxide and ozone absorb radiation strongly in some wavelength bands. The bands in between, where the atmosphere is nearly transparent, are called atmospheric windows: the visible and near-infrared band, the thermal infrared window around 8-14 micrometres and the microwave region. Remote sensors are designed to work in these windows.

Rayleigh scattering is the scattering of short wavelengths by molecules, which makes the sky blue; it is a loss, not a window. The Raman effect is a change of wavelength in scattered light, and the aurora borealis is light emitted when charged solar particles strike the upper atmosphere near the poles.

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