How is cosmic background radiation detected?

Answer 1

The approximate value of cosmic back ground radiation was predicted by George Gammov in 1948 Arno ,penzias and Robert Wilson found it when testing satellite antennas in 1964.

The CMB was then precisely mapped by a number of satellites, including Cobe, Wmap, and others.

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Answer 2

Josiah Adams

Radio telescopes, notably those equipped with the Planck satellite or ground-based observatories, are used to detect cosmic background radiation. By detecting faint microwave signals that are emitted from all directions in the universe, these telescopes are able to provide information about the conditions that existed in the early universe.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.