The speed of light (C) can be calculated from information in the Quran. Verses describing the moon's orbit and a "day" equal to 1000 years allow calculating C as 12,000 times the moon's velocity over its orbital period. Using the sidereal month cycle yields C = 299792.5 km/sec, matching modern measurements to within experimental error. This supports the Quran's divine origin and accuracy.

1. This presentation is about howTHE SPEED OF LIGHTTHE SPEED OF ELECTROMAGNETIC WAVETHE HIGHEST SPEED IN THE UNIVERSEThat is 299792.5 km/sec.Can be determined / calculated exactly based onThe information taken from an old document

2. Perhaps you have ever known that the constant C, or the speed of light that is the highest speed in the universe has been calculated, measured or determined by the institutions below:US National Bureau of StandardsC = 299792.4574 + 0.0011 km/secThe British National Physical Laboratory C = 299792.4590 + 0.0008 km/sec17th conference on measurements and weight standards”one metre is the distance reached by the light in vacuum in 1/299792458 sec".

3. But you should know that the constant C can be determined / calculated using the information taken from a holy book sent down 14 centuries ago..The holy Qur’an, the holy book of IslamThe inventor of this calculation is a physicist from Egypt, DR. Mansour Hassab El Naby

4. It is told in the holy Qur’an:”It is He (ALLAH) who made the sun to be a shinning glory and the moon to be a light (of beauty), and measured out stages for it, that ye might know the number of years and the count (of time)”- (10:5)”It is He (ALLAH) who created the Night and the Day, and the sun and the moon: All (the celestial bodies) swim along, each in its rounded course“ – (21:33)“He directs the affairs from the heavens to the earth: then it ascends unto Him, on a Day the measure of which is a thousand years of your reckoning” (32:5)

5. Based on verses, mainly the last verse (verse 32:5) it can be concluded that: The distance reached by The affairs in a dayis equal toThe distance reached by the moon in 1000 years or 12000 monthsC . t = 12000 . Lwhere : C = the speed of the Affairs t = time in a day L = the route length of the moon’s trip in one month

6. Many calender systems, has been tested, But only “sidereal month calendar system” produce the value C Which equal to the value of C based on measurement There are two month calendar systems:1. Sinodic System, based on virtual apparition of moon’s and sun’s motions from the earth.1 day = 24 hours 1 month = 29.53059 days2. Sidereal System, based on relative motion of the moon’s and the sun to the star in universe.1 day = 23 hours 56 minutes 4.0906 seconds= 86164.0906 seconds 1 month = 27.321661 days

7. This simulation is given to show you the difference between sidereal month and the sinodic29.1061oConsider the moon’s position after 29.52 daysThe moon position !The period time360o revolution moon = 26.92484o revolution earthThis period in 27.321661 days or655.71586 hours.And it is called “One sidereal moon”The moon go back to initial position exactly in line between the sun and the earth. This period is called “one sinodic moon”26.92484o

8. L27.321661 days365.25636 days =* 360o= 26.92848oThen consider the moon’s route during one sidereal monthThe route is not of a circle like you possibly imagineBut in the form of a curvature with a length of L = v . T= v. Twhere: v = the speed of the moon T = moon revolution period = 27.321661 days26.92848o

9. A Note on the speed of moon (v)There are two types of moon’s speed :1.Relative speed to earth which can be calculated with the following formula: ve = 2 .  . R / Twhere R = radius of moon revolution = 384264 km T = the period of moon’s revolution = 655.71986 hoursHence ve = 2 * 3.14162 * 384264 km / 655.71986 hrs = 3682.07 km/hr2. Relative speed to star or universe. This is what we needAlbert Einstein proposed that this type of speed can be calculated by doing a multiplication of the first with cosine , so that:v = Ve * CosWhere  is the angle formed by earth’s revolution during one sidereal month = 26.92848o

10. Remember !L = v . THence:C . t = 12000 . LRemember !v = ve . Cos C . t = 12000 . v . TRemember !ve = 3682.07 km/hr = 26.92848oT = 655.71986 hrs t = 86164.0906 secC . t = 12000 . ( ve . Cos  ) . TC = 12000 . ve . Cos  . T / tC = 12000 * 3682.07 km/hr * 0.89157 * 655.71986 hrs / 86164.0906 secC = 299792.5 km/sec

11. Compare the C (the speed of the Affairs) as the result of this calculation with the C (the speed of light) which has been known !The C calculatedC = 299792.5 km/secThe C measuredUS National Bureau of Standards C = 299792.4574 + 0.0011 km/secThe British National Physical Laboratory C = 299792.4590 + 0.0008 km/sec“One meter is a distance reached by the light in vacuum in 1/299792458 seconds"17th conference on measurement and weight standard

12. The holy Qur’an 32: 1-5In the name of Allah, Most Gracious, Most MercifulAlif Lam Mim. (This is) the revelation of the Book in which there is no doubt, from the Lord of the WorldsOr do they say “he (Mohammed) has forged it ?”, Nay, it is the Truth from thy Lord that thou mayest admonish a people to whom no warner has come before thee : in order that they may be rightly guided.It is Allah Who has created the heavens and the earth, and all between them, in six Days. Then He established Himself on the Throne: Ye have none, besides him, to protect or intercede (for you) . Will ye not then receive admonition ?He directs the affairs from the heavens to the earth: then it ascends unto Him, on a Day the measure of which is a thousand years of your reckoning

13. The conclusion(from the article of Prof Elnaby)“This calculation proved the accuracy and consistency of the constant C resulted from measurement and also shows the truth of the Holy Qur’an as revelation which is proper to be studied with a sharp analysis for the Writer is the Creator of the universe”

14. Reference:Elnaby, M.H.,1990, A New Astronomical Quranic Method for The Determination of The Greatest Speed Chttp://www.islamicity.org/Science/960703A.HTM1995, Astronomy, Journey of the Cosmic Frontier,1st edition, Mosby-Year Book, Inc., St Louis, MissouriFix, John D.The Holy Quran online,http://islam.org/mosque/quran.htm

15. Writer:Muhammad Zuhdihttp://www.angelfire.com/mo/zuhdiemail : m.zuhdi@mailcity.comzuhdi@itc.nlmohd.zuhdi@msc.girs.wau.nlThe End