Microwaves and Radio Waves
See also: Radio windowThe pure rotation spectrum of water vapor extends into the microwave region.
Liquid water has a broad absorption spectrum in the microwave region, which has been explained in terms of changes in the hydrogen bond network giving rise to a broad, featureless, microwave spectrum. The absorption (equivalent to dielectric loss) is used in microwave ovens to heat food that contains water molecules. A frequency of 2.45 GHz, wavelength 122 mm, is commonly used.
Radiocommunication at GHz frequencies is very difficult in fresh waters and even more so in salt waters.
Read more about this topic: Electromagnetic Absorption By Water
Famous quotes containing the words radio and/or waves:
“We spend all day broadcasting on the radio and TV telling people back home what’s happening here. And we learn what’s happening here by spending all day monitoring the radio and TV broadcasts from back home.”
—P.J. (Patrick Jake)
“Your eyes have pardoned our faults,
your hands have touched us
you have leaned forward a little
and the waves can never thrust us back
from the splendour of your ragged coast.”
—Hilda Doolittle (1886–1961)