The MAIN absorber in the atmosphere for infrared radiation,which impedes observations of astronomical infrared objects,is:
A) water vapor, H₂O.
B) nitrogen and oxygen (N₂ and O₂), the major constituents of the atmosphere.
C) electrons and ionized atoms in Earth's ionosphere.
D) dust.

Question

Quizplus · Accepted Answer

Water vapor is the main absorber of infrared radiation in the atmosphere, which makes it difficult to observe objects in the infrared spectrum from the ground. Nitrogen and oxygen are not effective absorbers of infrared radiation, whereas electrons and ionized atoms in Earth's ionosphere mostly affect radio waves, not infrared radiation. Dust can also absorb infrared radiation, but it is not the main absorber in the atmosphere.

The MAIN Absorber in the Atmosphere for Infrared Radiation,which Impedes