This document discusses how the speed of light/electromagnetic waves (C) can be calculated based on information found in the Quran from over 14 centuries ago. It describes how physicist Dr. Mansour Hassab El Naby used references to the moon's orbit and phases in verses 10:5, 21:33, and 32:5 to derive an equation that calculates C as 299792.5 km/sec, matching modern measurements. The document concludes this accurate calculation is evidence that the Quran deserves careful analysis as a revelation from the Creator of the universe.

1. This presentation is about how
THE SPEED OF LIGHT
THE SPEED OF ELECTROMAGNETIC WAVE
THE HIGHEST SPEED IN THE UNIVERSE
That is 299792.5 km/sec.
Can be determined / calculated exactly based on
The 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 Standards
C = 299792.4574 + 0.0011 km/sec
• The British National Physical Laboratory
C = 299792.4590 + 0.0008 km/sec
• 17th 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 Islam
The 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 day
is equal to
The distance reached by the moon in 1000 years or 12000 months
C . t = 12000 . L
where : 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 days
2. 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. Consider the moon’s position after
The moon position !
29.52 days
The period time
360o revolution moonto initial position exactly earth
The moon go back = 26.92484o revolution in line
between the sun and the earth. This period is called
This period in 27.321661 days or 655.71586 hours.
“one sinodic moon”
And it is called “One sidereal moon”
29.1061o
26.92484o

8. Then consider the moon’s route during one sidereal month
The route is not of a circle like you possibly imagine
But in the form of a curvature with a length of L = v . T
L = v. T
where:
v = the speed of the moon
T = moon revolution period
26.92848o
= 27.321661 days
27.321661 days
= o = 26.92848o
365.25636 days * 360

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 / T where R = radius of moon revolution = 384264 km
T = the period of moon’s revolution = 655.71986 hours
Hence ve = 2 * 3.14162 * 384264 km / 655.71986 hrs
= 3682.07 km/hr
2. Relative speed to star or universe. This is what we need
Albert 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 !
Hence: L = v.T
C . t = 12000 . L Remember !
v = ve . Cos
C . t = 12000 . v . T
Remember !
C . t = 12000 . ( ve . Cos ).T ve = 3682.07 km/hr
= 26.92848o
T = 655.71986 hrs
t = 86164.0906 sec
C = 12000 . ve . Cos .T/t
C = 12000 * 3682.07 km/hr * 0.89157 * 655.71986 hrs / 86164.0906 sec
C = 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 calculated C = 299792.5 km/sec
The C measured
US National Bureau of Standards C = 299792.4574 + 0.0011 km/sec
The British National
C = 299792.4590 + 0.0008 km/sec
Physical Laboratory
17th conference on “One meter is a distance reached by the light in
vacuum in 1/299792458 seconds"
measurement and weight standard

12. The holy Qur’an 32: 1-5
In the name of Allah, Most Gracious, Most Merciful
Alif Lam Mim. (This is) the revelation of the Book in which there is no doubt, from the Lord of the Worlds
Or 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 C
http://www.islamicity.org/Science/960703A.HTM
Fix, John D. 1995, Astronomy, Journey of the Cosmic Frontier,
1st edition, Mosby-Year Book, Inc.,
St Louis, Missouri
The Holy Quran online, http://islam.org/mosque/quran.htm

15. The End