1. Gravity
Written by:
ABDEL DAYEM AL KAHEEL
www.kaheel7.com
Prepared by:
Ahmed Adham
ahmed.adham.eg@gmail.com
Dina Shawky
dinashawkyeg@gmail.com
2. Our Agenda
In this presentation we will demonstrate the
following points:
• The aim of the presentation.
• What is gravity?
• Can we see gravity?
• Feeling the effect of gravity.
• Absence of gravity.
• Gravity around earth.
• Gravity and light.
• Gravity and astronomy.
• Gravity in the religion of Islam.
4. This presentation has an aim to spread
culture of the scientific miracle
in the Qur'an and Sunnah
to demonstrate the
Tolerance of Islam
to prove that this religion is away from
fanaticism and ignorance.
6. • Gravity or gravitation is a natural phenomenon by
• Also it objects with mass attract oneto fall when they
which is a force that causes things another.
are dropped.The force of gravity gives things their
weight.
• Every object has its own force of gravity.
• Gravity depends on the amount of material that
makes up an object. The more material an object has,
the stronger is its force of gravity. The force of gravity
between two objects decreases as the objects get
farther apart.
7. Isaac Newton
•Was the first one to discover the law of gravity in the 17th century.
•He stated that :any two objects or particles having nonzero mass,
the force of gravity tends to attract them toward each other.
•Gravity operates on objects of all sizes, from subatomic particles
to clusters of galaxies. It also operates over all distances, no
matter how small or great.
11. When a man wants to parachute out of a
plane he falls down towards the ground
because of gravity.
Gravity
Ground
12. Also
With Against
gravity gravity
When we descend But we feel tired when
down we don’t feel tired we ascend up
Walking on earth is the natural movement
16. It turns out that in some places you will feel
slightly heavier than others. The next map will
show us in exaggerated highs and lows where
the gravitational field of earth is relatively strong
and weak.
17. • A low spot can be seen just off the coast of India,
while a relative high occurs in the South Pacific
Ocean.
• The cause of these irregularities is unknown since
present surface features do not appear dominant.
• Scientists hypothesize that factors that are more
important lay in deep underground structures and
may be related to the earth's appearance in the
distant past.
19. Light is affected by gravity, but not in its speed.
General relativity gives two effects of gravity on light.
1 2
It can bend light (which It can change the energy of
includes effects such as light by shifting the
frequency of the light
gravitational lensing) by
(gravitational redshift) not
warping space so that by changing light speed.
what the light beam sees
as "straight" is not
straight to an outside
observer.
The speed of light is still constant.
21. Astronomers say that all the planets
have gravity that attracts the nearby bodies and
the force of gravity is proportional
to the mass of this planet
and
the distance between it and the bodies that it
attracts
22. So that, all the cosmic bodies like the sun, moon,
planets, stars, and cosmic dust, etc..
all have gravitational fields.
25. The moon has its own gravity, but it is not as
strong as that of Earth. That is why astronauts
on the moon can carry equipment that would
be too heavy to carry on Earth.
26. On Earth, you might be able to jump 3 feet
(almost 1 meter). On the moon, which has low
gravity, you might jump 20 feet (6 meters). On
Jupiter, which has high gravity, you could jump
only 14 inches (35 centimeters).
On Earth On Jupiter
On the moon
27. Fun in space
An astronaut who finds juggling fruit is easy
without Earth's gravity pulling it down.
28. Therefore the earth has a gravity field that
attracts people to it and because of this
gravity the objects are settled on the surface
of the earth even the atmosphere.
29. This means that if there wasn't a
gravitational field for the earth, the
atmosphere would have escaped and faded
away in the outer space.
Hence, the gravity is the reason for the
stability of life on earth.
31. In the holy Qur’an Allah refers to this
phenomenon in clear signs as He
Almighty says:
32. (Allah, it is He Who has made for you
the earth as a dwelling place
and the sky as a canopy, and has given you
shape and made your shapes good (looking)
and has provided you with good things.
That is Allah, your Lord: so blessed be Allah,
the Lord of the ‘Âlamîn
(mankind, jinn and all that exists)).
[Sûrat Ghafir, verse: 64]
33. The explanation of the verse
Almighty God talks about his graces that He
bestowed upon his people.
From these graces that He be exalted made
the earth settled for its inhabitants
and made the sky as a canopy.
He also created mankind in the best shape and He
provided them with good things.
34. The point of inimitability
Through Gods saying: (Allah, it is He Who has
made for you the earth as a dwelling place), we
notice that God be He exalted told us about
the grace of settling the earth and settling the
objects on its surface.
And the word (dwelling) refers to the stability of
creatures on the earth which is an indication to
the gravity and that is what scientists have
discovered.
35. :Allah Almighty Says
(And on the earth are signs for
those who have Faith with certainty.(
(Sûrat Az-Zariyat- verse 20)
36. In the Qur’an Allah talks to all mankind
(Muslims and non Muslims), for
Muslims to increase their faith and to fix
them on Islam and for non Muslims to
guide them to the straight way of Allah
to lead them to heaven where is the
eternity life.
