The longer, lower-energy wavellengt used in radio astronomy allow for the delection of objects that are dim, distant, cool, or hidden by dust. The CMB - cosmic microwave background - raduation is the map of the heat glow from the beginning of the universe. Which type of telescope would work best to detect cosmic microwave background?
a. radio and gamma
b. radio and x -ray
c. radio and mictowave
d. radio and visible
