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

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

At the same time, studies of the cosmic microwave background have long suggested that matter could be more tightly clustered across the largest scales of the Universe than expected.

From Science Daily ● Aug. 2, 2026

Arno Penzias at Bell Labs won the Nobel Prize in Physics for discovering “cosmic microwave background radiation” from the Big Bang.

From The Wall Street Journal ● Mar. 29, 2026

This is consistent with the observations of the microwave background radiation, which show that it has almost exactly the same intensity in any direction.

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