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Wednesday, June 27, 2012

Radio receivers


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)

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:
The radio system consists of a transmitter and a receiver. The transmitter takes the message to be sent, encodes it in what is known as a “sinus wave” and transmits it in the 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 sent are 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 70 meters across for its satellites millions of kilometers away in space.

There are also radio telescopes which use radio waves to form images. Since radio waves are very long, a radio telescope has to be much 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 smalletelescopes 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 enable them 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.



  1. 113.001 Say: I seek refuge with the Lord of the Dawn

    113.002 From the mischief of created things;

    113.003 From the mischief of Darkness as it overspreads;

    113.004 From the mischief of those who practise secret arts;

    113.005 And from the mischief of the envious one as he practises envy.

    Al-Qur'an, 113.001-006 (Al-Falaq [The Daybreak, Dawn])

  2. 100.001 By the (Steeds) that run, with panting (breath),

    100.002 And strike sparks of fire,

    100.003 And push home the charge in the morning,

    100.004 And raise the dust in clouds the while,

    100.005 And penetrate forthwith into the midst (of the foe) en masse;-

    100.006 Truly man is, to his Lord, ungrateful;

    100.007 And to that (fact) he bears witness (by his deeds);

    100.008 And violent is he in his love of wealth.

    100.009 Does he not know,- when that which is in the graves is scattered abroad

    Al-Qur'an, 100.001-009 (Al-Adiyat [The Courser, The Chargers])

  3. 089.001 By the break of Day

    089.002 By the Nights twice five;

    089.003 By the even and odd (contrasted);

    089.004 And by the Night when it passeth away;-

    089.005 Is there (not) in these an adjuration (or evidence) for those who understand?

    089.006 Seest thou not how thy Lord dealt with the 'Ad (people),-

    089.007 Of the (city of) Iram, with lofty pillars,

    089.008 The like of which were not produced in (all) the land?

    089.009 And with the Thamud (people), who cut out (huge) rocks in the valley?-

    Al-Qur'an, 089.001-009 (Al-Fajr [The Dawn, Daybreak])