radio window

American

noun

Astronomy.

the range of wavelengths at which the earth's atmosphere is transparent to radio waves.

radio window British

noun

a gap in ionospheric reflection that allows radio waves, with frequencies in the range 10 000 to 40 000 megahertz, to pass from or into space

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Reber had opened wide the radio window on the sky.

From Time Magazine Archive

The trailers, fitted with kitchen, shower, radio, window screens, flush toilet, are as comfortable as Miami bungalows.

From Time Magazine Archive

British astronomers, often frustrated by the persistent clouds over their murky island, have taken advantage of this "radio window" and are busily developing the brand-new science of radio astronomy.

From Time Magazine Archive

The radio window was accidentally opened for the first time in 1932 by Karl Jansky. a Bell Telephone physicist who was studying the crackling static that can be so annoying in radio communications.

From Time Magazine Archive

Still, the radio window has already brought the universe to life in numberless unexpected ways.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023