microwave background

British  

noun

1. a background of microwave electromagnetic radiation with a black-body spectrum discovered in 1965, understood to be the thermal remnant of the big bang with which the universe began

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microwave background Scientific  

1. See cosmic background radiation

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Example Sentences

See Examples For:

microwave background

One promising technique relies on the Sunyaev-Zel'dovich effect, which occurs when energetic particles inside galaxy clusters scatter radiation from the cosmic microwave background, the faint afterglow of the Big Bang.

From Science Daily ● Oct. 13, 2026

Shifting the moment when the universe becomes transparent changes the size of the observed patterns in the cosmic microwave background.

From Science Daily ● Oct. 4, 2026

To investigate which explanation better fits the evidence, the researchers analyzed ACT observations of the cosmic microwave background, or CMB.

From Science Daily ● Aug. 25, 2026

Scientists could also search the cosmic microwave background for subtle patterns that might preserve information from a time before the Big Bang.

From Science Daily ● Aug. 11, 2026

Observations of the microwave background and of the abundances of the light elements indicate that the early universe did not have the kind of curvature required to allow time travel.

From "A Brief History of Time: And Other Essays" by Stephen Hawking