Posts Tagged ‘Gravitation’
Let’s see how much we know about it.
Note the Definition, ‘appears to attract’ – We are not sure.
Einstein’s Views -’Theory of General Relativity‘ as applied to Gravity.
Space and Time , Spacetime condition Gravity.
“General relativity, or the general theory of relativity, is the geometric theory of gravitation published by Albert Einstein in 1916 and the current description of gravitation in modern physics. General relativity generalises special relativity and Newton’s law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of partial differential equations.”…
Some predictions of general relativity differ significantly from those of classical physics, especially concerning the passage of time, the geometry of space, the motion of bodies in free fall, and the propagation of light. Examples of such differences include gravitational time dilation, gravitational lensing, the gravitational redshift of light, and the gravitational time delay. The predictions of general relativity have been confirmed in all observations and experiments to date. Although general relativity is not the only relativistic theory of gravity, it is the simplest theory that is consistent with experimental data. However, unanswered questions remain, the most fundamental being how general relativity can be reconciled with the laws of quantum physics to produce a complete and self-consistent theory of quantum gravity.
Space is curved(please read my blogs under Astrophysics).
Have we defined Space, Tie?
Consequently Gravitation as influenced by Spacetime,at best, remains a conjecture.
Newton on Gravity(theory discared, yet being used in Calculations)
“ “I deduced that the forces which keep the planets in their orbs must [be] reciprocally as the squares of their distances from the centers about which they revolve: and thereby compared the force requisite to keep the Moon in her Orb with the force of gravity at the surface of the Earth; and found them answer pretty nearly’…
Although Newton’s theory has been superseded, most modern non-relativistic gravitational calculations are still made using Newton’s theory because it is a much simpler theory to work with than general relativity, and gives sufficiently accurate results for most applications involving sufficiently small masses, speeds and energies.’
Irrespective of the fact whether our Theory is Right or Wrong, Principles of Nature work,so much for Science.
By the way , can some one forward me the exact definition of Nature?
a) Earth is ‘assumed’ to be surrounded by its own Gravitational Filed, which exerts an attractive force on all objects. Assuming a spherically symmetrical planet, the strength of this field at any given point is proportional to the planetary body’s mass and inversely proportional to the square of the distance from the center of the body….
The fundamental is an Assumption.
Again, ‘ This means that, ignoring air resistance, an object falling freely near the Earth’s surface increases its velocity by 9.81 m/s (32.2 ft/s or 22 mph) for each second of its descent. Thus, an object starting from rest will attain a velocity of 9.81 m/s (32.2 ft/s) after one second, 19.62 m/s (64.4 ft/s) after two seconds, and so on, adding 9.81 m/s (32.2 ft/s) to each resulting velocity. Also, again ignoring air resistance, any and all objects, when dropped from the same height, will hit the ground at the same time.
‘The strength of the gravitational field is numerically equal to the acceleration of objects under its influence, and its value at the Earth’s surface, denoted g, is approximately expressed below as thestandard average.
g = 9.81 m/s2 = 32.2 ft/s2′
We want to know Earth’s Gravitation, that is what we want to prove.
Acceleration of Bodies is determined the force of Gravitation.
So when we rely on the Acceleration of Objects under the influence of the Earths’ gravitation , have we not already assumed Earth’s Gravity?
We also ignore the effect of Electromagnetism and other forces at work,EM being dependent on Gravitation or is the other way around?
The Theory is riddled with Assumptions and leaping to conclusions.
Chinese Scientists have found a way to measure Gravity and it throws Spanner in the works.
‘By conducting six observations of total and annular solar eclipses, as well as Earth tides, a team headed by Tang Keyun, a researcher with the Institute of Geology and Geophysics under the Chinese Academy of Sciences (CAS), found that the Newtonian Earth tide formula includes a factor related to the propagation of gravity.
“Earth tide” refers to a small change in the Earth’s surface caused by the gravity of the moon and sun.
Based on the data, the team, with the participation of the China Earthquake Administration and the University of the CAS, found that gravitational force released from the sun and gravitational force recorded at ground stations on Earth did not travel at the same speed, with the time difference exactly the same as the time it takes for light to travel from the sun to observation stations on Earth.
[…] By applying the new data to the propagation equation of gravity, the team found that the speed of gravity is about 0.93 to 1.05 times the speed of light with a relative error of about 5 percent, providing the first set of strong evidence showing that gravity travels at the speed of light.”
Einstein’s Theory that Time is not a Constant and and that it Dilates, relative to Gravitation has been proved.
If the Gravitation pull is less you age slower and if more you age faster.
Let’s extend this Logic further.
If you keep on increasing the G, your longevity increases.
So at a particular point of Gravitation, you would live indefinitely.
But the question is shall the object that exerts Gravitation change with increase in Gravitational pull?
Does it pull itself?
What are its states vis-a-vis change in Pull?
Does the object it pulls change its state based on the Pull exerted on it?
To understand the seemingly paradoxical Nature of Time please read my Blog
http://www.independent.co.uk/news/science/einsteins-theory-is-proved–and-it-is-bad-news-if-you-own-a-penthouse-2088195.html and check blogs under Time/Astrophysics.
The world’s most accurate clock has neatly shown how right Albert Einstein was 100 years ago, when he proposed that time is a relative concept and the higher you live above sea level the faster you should age.
Einstein’s theory of relativity states that time and space are not as constant as everyday life would suggest. He suggested that the only true constant, the speed of light, meant that time can run faster or slower depending on how high you are, and how fast you are travelling.
Now scientists have demonstrated the true nature of Einstein’s theory for the first time with an incredibly accurate atomic clock that is able to keep time to within one second in about 3.7 billion years – roughly the same length of time that life has existed on Earth.
James Chin-Wen Chou and his colleagues from the US National Institute of Standards and Technology in Boulder, Colorado, found that when they monitored two such clocks positioned just a foot apart in height above sea level, they found that time really does run more quickly the higher you are – just as Einstein predicted.
“These precise clocks reveal the effects of gravitational pull, so if we position one clock closer to a planet, you also increase the gravitational pull and time actually runs slower than for another, similar clock positioned higher up,” Dr Chou said. “No one has seen such effects before with clocks which is why we wanted to see if these effects are there. We would say our results agree with Einstein’s theory – we weren’t expecting any discrepancies and we didn’t find any,” he explained.
Pentagram forms essential part in all these practices; so does it in Quantum.
As to logical sequencing the Saptha bhangi Naya of the Jainism is the best.
This methodology bears a striking resemblance to Quantum Logic.
Seven modes of postulation are possible.
2.It is not.
3.It is indescribable.
4.It is and it is not.
5.It is not and indescribable.
6.It is and it is indescribable.
7.It is and it is not and it is indescribable.
No more postulation are possible.
Compare this with Quantum
all quantum equations are based on 5 outcomes.
1. All A
2. All B
3. Equally A & B
4. Combination of A & B, either mostly A or mostly B
5. Neither A nor B
So, pentagons/pentagrams come as no surprise”
Do you know what a 2-d projection of a pentachoron is? An inverted pentagram!
Watch 4:28-5:00 for the “program-conjuring” part:
Truth always seems to be self contradictory and indiscriminate.Human mind can not accept self contradictions, but it is the way things are.
The law of gravity, contrary to what Marion Barry says, is — perhaps — the most indiscriminate of all the laws of nature.
“The laws in this city are clearly racist. All laws are racist. The law of gravity is racist.” -Marion Barry
The Universe is a lot like this. In the early stages, the Universe was filled with an incredibly large number of small galaxies and clusters, where a typical one contained maybe only a few million times the mass of our Sun. In other words, the vast majority of these baby galaxies were less than 0.1% the mass of our Milky Way!
But our Universe today has a huge population of heavyweights. In other words, where have the lions and dump trucks gone? Why are there so few left? And why are there so many Voltrons and Devastators out there?