F layer
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F layer
noun Physics.
the highest of the radio-reflective ionospheric layers, beginning at an altitude of about 80 miles (130 km) and consisting of two parts, the lower part (F layer) being detectable in the daytime only, the higher (F layer or Appleton layer) being constant and constituting the ionospheric layer most favorable for long-range radio communication.
Origin:
1925–30
1925–30
00:10
F layer
is always a great word to know.
So is quincunx. Does it mean:
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
Dictionary.com Unabridged
See under F layer.
See under F layer.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
|
Link To f layer
American Heritage
Science Dictionary
| F layer
See F region. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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