Definition of background radiation in English:
noun[mass noun] Astronomy
The uniform microwave radiation remaining from the Big Bang.
- This microwave interference came to be recognized as cosmic background radiation, a remnant of the Big Bang.
- We are also exposed to naturally occurring radiation or background radiation.
- It's called the cosmic background radiation - radiation that originated in that primordial fire ball.
Definition of background radiation in:
- US English dictionary
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