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

Question

Quizplus · Accepted Answer

Infrared space telescopes are designed to detect infrared radiation emitted by celestial bodies. If the mirror of such a telescope is not cooled to very low temperatures, it would emit its own infrared radiation, which would interfere with the signals being detected from space. Therefore, the mirror must be cooled to a temperature that radiates the least amount of infrared to ensure the quality of data obtained.

Infrared Space Telescopes Must Have Their Mirror Cooled to Very