1) The document discusses how the speed of light (C) can be calculated from information in the Quran given over 1400 years ago. 2) The calculation uses the distance traveled by the moon in one month along its curved path, and equates it to the distance that would be traveled by light in 1000 years. 3) Using the sidereal month calendar and moon's speed, the calculation determines C to be 299792.5 km/sec, matching modern measurements of the speed of light from scientific institutions.

1. This presentation is about how
THE SPEED OF LIGHT
THE SPEED OF ELECTROMAGNETIC WAVE
THE HIGHEST SPEED IN THE UNIVERSE
Can be determined / calculated exactly based on
The information taken from an old document
That is 299792.5 km/sec.

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 inventor of this calculation is a physicist from
Egypt, DR. Mansour Hassab El Naby
The holy Qur’an, the holy book of Islam

4. It is told in the holy Qur’an:
“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)
”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)

5. Based on verses, mainly the last verse (verse
32:5) it can be concluded that:
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
The distance reached by The affairs in a day
is equal to
The distance reached by the moon in 1000 years or 12000 months

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. The moon position !
α
26.92484o
α
29.1061o
Consider the moon’s position after
29.52 days
The period time
360o
revolution moon = 26.92484o
revolution earth
This period in 27.321661 days or 655.71586 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”

8. α
L
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
= v. T
where:
v = the speed of the moon
T = moon revolution period
= 27.321661 days
26.92848o
27.321661 days
365.25636 days * 360o = 26.92848oα =

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 . π . R / T where R = radius of moon revolution = 384264 km
T = the period of moon’s revolution = 655.71986 hours
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 α, so that:
v = Ve * Cos α
Where α is the angle formed by earth’s revolution during one sidereal month
α = 26.92848o
Hence ve = 2 * 3.14162 * 384264 km / 655.71986 hrs
= 3682.07 km/hr

10. Hence:
C . t = 12000 . L
C . t = 12000 . v . T
C . t = 12000 . ( ve . Cos α ) . T
C = 12000 . ve . Cos α . T / t
C = 12000 * 3682.07 km/hr * 0.89157 * 655.71986 hrs / 86164.0906 sec
C = 299792.5 km/sec
Remember !
L = v . T
Remember !
v = ve . Cos α
Remember !
ve = 3682.07 km/hr
α = 26.92848o
T = 655.71986 hrs
t = 86164.0906 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
→ US National Bureau of Standards
→ The British National
Physical Laboratory
→ 17th
conference on
measurement and weight standard
The C measured
C = 299792.4574 + 0.0011 km/sec
C = 299792.4590 + 0.0008 km/sec
“One meter is a distance reached by the light in
vacuum in 1/299792458 seconds"

12. 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
In the name of Allah, Most Gracious, Most Merciful
The holy Qur’an 32: 1-5

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