Infra-red space telescopes must have their mirror cooled to very low temperatures because otherwise it would thermally emit too much ____ itself.
A) infra-red radiation
B) radio waves
C) X-waves
D) gamma rays
E) all of the above

Question

Quizplus · Accepted Answer

Infra-red space telescopes must have their mirrors cooled to very low temperatures to minimize the emission of infra-red radiation from the mirrors themselves, which could interfere with the detection of faint astronomical infra-red signals.

Infra-Red Space Telescopes Must Have Their Mirror Cooled to Very