Radio receivers on mountains

We gave Dawud great favor from Us: " O mountains and birds! Echo with
him in his praise! " And We made iron malleable for him: (Surah Saba',
10)
A radio telescope on Peach Mountain,
in Dexter, Michigan
The description of mountains "echoing" in the above verse may be a
reference to the way that radios work. (Allah knows the truth.) The
basic principles on which radios operate may be summarized as follows:
There are also radio telescopes which use radio waves to form images.
Since radio waves are very long, a radio telescope has to bemuch
larger in order to collect them as images sufficiently clear to be
compared. In order to obtain sharper and better images, astronomers
use a connected series of smaller telescopes or receptors. These
telescopes act collectively as one very large one. And in physical
appearance, these series resemble mountain systems.
In addition, "repeaters" are employed to permit radio communications
over every great distances. These devices repeat and strengthen weak
signals and enablethem to be transmitted over considerable distances.
Such devices are generally sited on tall buildings or on the tops of
mountains for preference, in order to have the greatest effect. The
use of the word "awwibi," translated as "echo" in the above verse, is
exceedingly wise. The statement of, "O mountains and birds! Echo with
him in his praise!'" in verse 10 of Surah Saba' may thus be a
description of that technology. Allah knows the truth.
Each of the antennae in the picture
weighs 212 tons, is as high as a
10-storey building and measures
25 meters across. i
The radio system consistsof a transmitter and a receiver. The
transmittertakes the message to be sent, encodes it in what is known
as a "sinus wave" and transmits it inthe form of waves. The receiver
takes in the radio waves and deciphers the message sent on the sinus
wave. In this way, the message is received in exactly the same form as
it was sent.The word "awwibi," translated as "echo" in the above verse
and meaning "sound being repeated or returned", may very well be a
reference to the transmission of these radio waves. (Allah knows the
truth.) Sounds emitted in the form of sound waves by way of an antenna
in order that the receiver can take in the data sentare also met by an
antenna linked to the receiver. The purpose behind using antennae is
the transmission into space of the waves emitted by the radio
transmitter. The receiving antenna is intended to collect as many
radio waves and messages as possible. That is why NASA uses giant
antennae bowls 70meters across for its satellites millions of
kilometers away in space.

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