Why must far-infrared astronomy be done from high-flying aircraft or spacecraft?
A)Far-infrared radiation is absorbed low in the Earth's atmosphere.
B)Far-infrared photons are quite energetic.
C)Far-infrared photons have long wavelengths.
D)Far-infrared radiation is reflected from the top of the Earth's atmosphere.

Question

Quizplus · Accepted Answer

Far-infrared radiation is absorbed by water vapor and other gases low in the Earth's atmosphere. Therefore, in order to observe this type of radiation from space, observations must be conducted from high-flying aircraft or spacecraft above most of the Earth's atmosphere.

Why Must Far-Infrared Astronomy Be Done from High-Flying Aircraft or Spacecraft