[pasala (OP)]

If the elevator is accelerating at 9.8m/s/s then the force we would be exerting on the floor would be twice our normal weight

Yeah, you are 100% correct.  If you are in a car, accelerating forward or applies brake, it is the problem.  Ones the ride is smooth, no such effects.

[pasala (OP)]

Suppose, let us imagine that you are in a closed elevator, which is at rest or stationary on the ground and if you let the ball to fall on the ground, it behaves or fall to the ground, similarly as if on Earth.  So, it is clear that gravity can be packed within a small region and it behaves, similar to that of one on the Earth.

Further, if the elevator accelerates upwards, it is the elevator, alone, moving forward, and in turn literally it lifts the contents therein.  This is the reason, if you allow a light beam to pass through a hole:

01  if the elevator is at rest or stationary on the ground, the light beam passes through the other hole.

02 If there were relative acceleration, the light beam would follow a curved path, with the magnitude of curvature determined by the magnitude of the acceleration.

03 If there were relative motion or velocity, the light beam would move in a straight line, but would be displaced from going directly across.

So, it is clear that gravity influences the movement of light.  When the elevator accelerates forward, gravity moves in opposite direction and it bends the light.

As per Einstein, gravitational force, as we experience it on Earth's surface, weight, is actually caused by space time accelerating through us on its way to the center of the Earth.

In other words, there is strong gravity on Earth.

If it is spatial flow:
01 Don’t it influences, Sun light entering our Earth's surface.
02 Don’t it influences, your electric light
03  Don’t it influences, torch light etc.,

Believe it or not, it is influencing, your every day actions.  If we could understand gravity in a better, we can do wonders.

Yours
Psreddy

[Kryptid]

03 If there were relative motion or velocity, the light beam would move in a straight line, but would be displaced from going directly across.

No it wouldn't. It would behave identically to 01 (being at rest).

[Janus]

03 If there were relative motion or velocity, the light beam would move in a straight line, but would be displaced from going directly across.

No it wouldn't. It would behave identically to 01 (being at rest).

To be fair, it depends on whether or not the light source and elevator are in relative motion with respect to each other.

[Kryptid]

To be fair, it depends on whether or not the light source and elevator are in relative motion with respect to each other.

That's true. I assumed that the light source was on the elevator and passing through a hole in the wall opposite of it.

[pasala (OP)]

Well, Galileo’s idea, “relative motion of objects” written by him in ships is perfectly valid.  “If you are in a closed room on a ship and the ship is sailing at constant speed and the ride is perfectly smooth, objects behave as if on land”.   
Taking this idea further, Einstein carried out number of experiments.

His Equivalence principle assert that:
“Imagine that you are in a closed elevator and if you pick up an object and let it drop, it falls to the floor, exactly, like an object that fall to the ground on Earth”.

Ok, suppose that:
“imagine that you are in a closed cabin of space ship, accelerating forward at 9.81 metres per second in deep space, as long as the engine work, if you let go of an object, the cabin floor would accelerate towards the object at 9.81 metres per second”.

Well, this is perfectly valid statement. 

However there are several important questions:
01  Gravity inside the elevator and the space ship, in a small region is perfectly valid and behaves similar to that of one on Earth.
02  Isn’t it gives an idea that gravity can be packed in a small region.
03  Basic idea of Einstein is that, the elevator is on Earth’s surface, in other words, under the influence of  “Gravity or attraction of Earth”. 
04  Whereas the space ship is in deep space, off the gravity field, far away from Earth’s gravity, still there is gravity in the space cabin, as long as the “engine works”, why?. 
05 Einstein could not come out of Newton’s inverse square law.
06  It is true that cabin of the space ship is closed or packed in a gravity field only.  So, there is gravity within the atmosphere of the Earth, which can be packed or moved.
07  Einstein’s equivalence principle is valid, if a cabin of the space ship is closed in a non-gravity field i.e., deep space and if the acceleration generates gravity in the space cabin. 
08  Gravity in the space ship cabin is not due to the working of engine, but the gravity packed in cabin fails to inter act with the outside space time as long as the space ship is under acceleration.

Einstein’s idea is perfectly valid, If the cabin of the space ship is packed in a non-gravity field and acceleration generates or creates gravity,

Yours
Psreddy

[pasala (OP)]

03 If there were relative motion or velocity, the light beam would move in a straight line, but would be displaced from going directly across.

No it wouldn't. It would behave identically to 01 (being at rest).

To be fair, it depends on whether or not the light source and elevator are in relative motion with respect to each other.

When the elevator accelerates forward:
01  It is the elevator alone that is moving forward.
02  Gravity inside the elevator is at rest or stationary.
03  Elevator while moving forward, lifts the gravity.
04  Gravity start collecting at the bottom.

This is the reason, if we accelerate forward in a car or train, we will be pushed back.  This is an important point left by our predecessors. 

It is true that if the elevator attains velocity, light beam would move in a straight line, but would be displaced.  Why and how it is displaced and what makes it to be displace from straight position. 
01  When the elevator moves forward, gravity is collected at the bottom.
02  Gravity is strong at the bottom and weak at the top.
03  There is no change or movement with regard to light source. 

It is true that Gravity bends the light.  Here, there are two important points.
01  Light source and the output is constant.
02  Gravity start collecting at the bottom of the elevator.

It is surprise to see, whether gravity bends the light or the light follows gravity.   

Yours
Psreddy

[Kryptid]

03  Elevator while moving forward, lifts the gravity.
04  Gravity start collecting at the bottom.

That doesn't make sense.

[pasala (OP)]

03  Elevator while moving forward, lifts the gravity.
04  Gravity start collecting at the bottom.

That doesn't make sense.

Ok, let us revisit what Galileo wrote about the relative motion of objects.  He wrote this in 1632 even before Newton published his famous work. 
“If you are in a closed room on a ship sailing at a constant speed and the ride is perfectly smooth, objects behave as they would on land”.

To be correct:
01  One must be in a closed room
02  Ship must move in a constant speed
03  Objects behave as if on land.

By that time, Galileo is not aware about Gravity.  It is a little bit surprise to Galileo, why objects in a closed room, if the speed is constant, behaves as if on land. 

This is the core idea behind relativity.  But Einstein left an important point, comparison of closed room to Earth. 
If Earth is not a closed one, why, we don’t we feel our movement in Solar system and also in galaxy.

Einstein simply extended this to an elevator:
“Imagine you are in an elevator or, more precisely, in what looks like an elevator cabin from the inside, and that you are isolated from the outside world. If you pick up an object and let it drop, it falls down to the floor, in exactly the way you would expect given your experiences here on Earth”.

By the time of Einstein science developed a lot.  He knew that there is gravity on Earth and it is giving weight.  In a small region such as elevator also there is gravity and objects are behaving as if on land.  Here, Einstein left an important point.  It is true that Gravity in a big area, Earth or in a small region, elevator is one and the same.  Gravity in a small region such as elevator is neither created nor developed artificially but only separated or packed.

He compared closed elevator to Earth, as such both must be true.   

If Earth is not a closed one, such as room of a ship or closed elevator, equivalence principle is incomparable, inconclusive and incorrect.   

Yours
Psreddy

[Kryptid]

That didn't explain it. Elevators don't lift gravity nor does gravity "collect at the bottom".

[pasala (OP)]

That didn't explain it. Elevators don't lift gravity nor does gravity "collect at the bottom".

Yeah, it only gives weight. 

We don't know, what exactly this medium is.  Even Einstein never said about it.  If it is a spatial flow, in a closed space ship cabin, how it is packed or moved.  If it is due to acceleration, close the cabin in a non gravity area and test it.

[pasala (OP)]

That didn't explain it. Elevators don't lift gravity nor does gravity "collect at the bottom".

Mr kryptid

Ok, let us analyse, elevator example of Einstein itself. 

If the elevator is at rest or stationary on the ground and if we pass light beam from one hole to the other hole, it simply passes through it.

If the elevator accelerates forward, light beam, accelerates downwards, equivalent to the acceleration of elevator.

If the elevator attains velocity, light beam would be displaced in a straight manner.

This is not done by me, but Einstein himself.  Ok, if the elevator accelerates forward, light beam would accelerates downwards.  The source of light beam is constant and moves upwards along with the elevator.  So, there is no change in source of light beam and it is constant.  But, why should, or what makes light beam to accelerate downward.  What is moving downward and making light beam to move downward.

As per Einstein, gravity bends the light.  This is absolutely Einstein statement only. 

As long as the elevator is at constant, gravity inside the elevator is also at constant and hence light passes through the other hole.

When the elevator accelerates forward, it is the Gravity moving downwards.  Gravity while moving downwards, bends the light.

Suppose, if the elevator attains velocity, downward shift of Gravity attains constancy and hence light beam would be displaced in a straight manner.

Yours
Psreddy

[Kryptid]

This is not done by me, but Einstein himself.

Nowhere did Einstein say that gravity can be lifted. He only stated that acceleration in an elevator cannot be distinguished from a static elevator in a uniform gravitational field.

When the elevator accelerates forward, it is the Gravity moving downwards.  Gravity while moving downwards, bends the light.

No it isn't. The acceleration of an elevator does not create a literal gravitational field. It's just that it has the same effect as gravity.

But, why should, or what makes light beam to accelerate downward

It doesn't. It's the elevator that is accelerating, not the light beam. No force is acting on the light beam.

[pasala (OP)]

Gravity, spatial flow?:

It is true that Einstein carried out number of experiments.  But he left some of the important points which decides “what exactly is gravity”.

Ok, suppose that if you are in a closed elevator and if you pick up an object and let it drop, it falls to the floor, in exactly the way you would expect given your experiences here on Earth.

Now, if the elevator is accelerated upward and Mr X is in the elevator:
01  You are lifting the elevator alone and not Mr. X.  In turn elevator lifts Mr. X, who is at rest or stationary. 
02  In the closed elevator also there is gravity and it behaves similarly to that of one on Earth.
03  Gravity along with other things in the elevator is at rest or stationary.
04  For this, there is best example of Einstein.   If you are in an elevator accelerating forward, if you leave the ball to fall, for the third person, cannot decide or say whether ball is coming down to the floor or floor is raising to the ball.
05  So, it is clear and undoubtedly correct that Gravity is pushing the ball and at the same time floor is also raising.
06  When the elevator is on Earth’s surface gravity is spread uniformly. 
07  The elevator while moving upwards lifts the gravity.  The medium or agent which we term as Gravity start collecting at the bottom. 
08  In other words there is high Gravity at the bottom and weak Gravity at the top. 
09  As the Gravity concentration increases, pressure or weight increases and it pushes you down. 
10  This is also clear from light beam experiment.  Light beam is not bend by itself, unless something bends it.  It is gravity only.  The same was proved by Einstein himself.

Features of Gravity:
01  Gravity can be packed in a small region such as elevator. 
02  When the elevator is lifted, Gravity concentration at the bottom increases and it gives additional weight or pushes you down.  It is clear from light beam experiment.  Gravity while moving down, bends the light.
04  When the concentration increases at the bottom, it causes or gives additional weight. 
05  So, it is clear that Gravity or weight is caused by this medium.  If the concentration of this medium increases at a place, gravity increases and if the concentration decreases, Gravity also decreases.   
06  Ones the elevator attains velocity, gravity neutralizes, in other words spreads.  So Gravity is having important quality of moving from high to low.

Do Gravity a Spatial flow?:
As per Einstein: “This famous principle begins with the recognition that a gravitational force, as we experience it on Earth's surface ("weight"), is actually caused by spacetime accelerating through us on its way to the center of the Earth. We feel the force only because we are unable to follow the natural flow of spacetime which tries to carry us with it. In "free fall" or orbit we are co-movers with the spatial flow, and feel no force at all, as we offer no resistance to its inertial urgings”.

01 If it is a spatial flow, it must be high at the starting and must diminish at the end, but it is not so.  It is high on Earth’s surface and decreases as we move up.
02 If it is a spatial flow, in a closed elevator where in a part of the Gravity is packed, should not behave as that of main one on Earth’s surface.  But no such difference.
03 If it is a spatial flow, it is impossible or difficult to pack or move in a cabin of space ship.

About Free fall:
“Free fall” is a game changer in Einstein’s General relativity.  Ok, suppose if you are on top of a building.  If you dives in, you will experience “free fall”, there is no gravity at all.  As per Einstein, this invisible force, Gravity, is nothing but acceleration of space time towards the centre of the Earth. 

As per Einstein, space time is accelerating through us on its way to the centre of the Earth.  In the case of “Free fall”, we are co-movers and therefore feel no Gravity at all. 
01  Yes, it is possible that we are co-movers and therefore there is no Gravity.
02  There is also other possibility that, Gravity or this invisible force is giving you weight only when you are at rest.
03 When you accelerates downwards, it fails to concentrate against you and give weight.  “Gravity is equated with acceleration”.

Free fall in elevator:
Suppose if you are in a closed elevator, accelerating downwards, you feel no weight at all, free fall.  Here, things are different.  As the elevator accelerates downwards, Gravity is collected at the top.  At the bottom there is weak gravity and you will experience “free fall”.

We have questioned Newton’s inverse square law, how a mass half a universe away attract other mass.  Similarly, Einstein’s spatial flow is not correct. 

Yours
Psreddy

[pasala (OP)]

Well, it is true that we all feel weight on Earth and we assume this as Gravity.  But what makes or causes or giving weight is important.  To find out truth Einstein carried out number of experiments.  It is true that there is gravity in the small region such as closed elevator and it behaves similarly to that of one on Earth.    If Mr. X is on the surface of the Earth or in closed elevator, there is no change in his weight of 75 kgs.  So, it is clear that, Gravity or the force giving you weight, need not be big one, even small one, sufficiently packed in a small area can give you the same results. 

Unless there was a change in the motion of elevator, there would be no physical effect on anything that occurred inside the elevator. 

Ok, let us analyse the light beam experiment, once again:
If you allowed a light beam from outside to enter one side of the elevator through a hole, and observed where it struck the wall on the other side.  If there were no relative motion of light source or the elevator, light beam will pass through the other hole.

Let us assume that the closed elevator is divided into four blocks, A,B,C,D.
If the elevator accelerates forward, relative to light source, the light beam accelerates downwards.  Let us assume that, light source is in block D, when the elevator started accelerating, light beam start moving down and crosses block D.  If the elevator accelerates further, light beam crosses even block C and enters block B.
     
01 In normal conditions, light travels in straight line.  When the elevator accelerates forward, light bends in opposite direction.
02  There is something moving downwards and in turn it is bending light.
03  It is also relative to acceleration or velocity.
It is nothing but Gravity only.  Here acceleration of elevator means, frame alone and in turn literally it lifts the things there in.
01  If the elevator accelerates forward, in turn it creates pressure on contents in block A.
02  As the elevator accelerates further, block A start giving pressure on block B..
03  As the density increases, weight or gravity increases.

Basic question is, what makes light beam to bend:
01  We take gravity for weight, so additional weight at the bottom tells us that there is additional gravity at the bottom, block A.
02  If the elevator accelerates forward, light beam accelerates downward.  What makes or causes the light beam to bend.
03  It is true that the elevator and the source of light is relative to each other.
03  As the elevator accelerates further, the medium i.e., causing gravity start joining at the bottom.  So, there is weak gravity at the top. 
04  If light travels in straight line it must cross the other hole.  It is true that light source is relative to the elevator. 
05  It is affected by the movement of Gravity.  It is true that Gravity concentration at the bottom is high when compared to the top.
06  It is the elevator that is moving up but not the Gravity and it is constant.  While moving upwards it is lifting the medium and its concentration or density increases.
07  What makes the light beam instead of flowing in a low gravity, to shift to high gravity.
08  Here, gravity or the medium is not coming down and bending the light beam.
09  It is the light beam that is changing its movement according to gravity.

Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. Light exists in tiny energy packets called photons. Each wave has a wavelength or frequency. 

When elevator is at rest or stationary on the ground, light is propogated in wavelength.  It is moving out through the other hole.  Now if the elevator accelerates, what makes light wavelength to change its direction. 


The medium, causing gravity and light are appears to be indispensable.


Yours
Psreddy

[puppypower]

Gravity is a way for matter to return to the ground state, with the ground state being the speed of light reference at the lowest energy.

If we started with the lowest energy photons, matter and anti-matter pairs will not appear until we reach the highest energy levels. Matter and mass only appear at the celling of energy. The inertial reference created by matter is also at the celling.

On the other hand, below a certain level of photon energy; say below gamma, matter and anti-matter pairs will no longer appear at any reversible equilibrium. At the lowest energy of the floor only photons exist.These move at the speed light. The speed of light is at lower potential than inertial references.

The ground state or the state of lowest mass/energy particles; floor,  are the longest wavelength photons. Infinite wavelength photons are the closest to the ground state at the speed of light.

Gravity expresses a universal movement of mass and matter toward the ground state. As mass accumulates, via gravity, the local space-time reference contracts. In the limit of the black hole, reference approach the reference of the speed of light; space-time contracts to a point-instant.

When the universe created matter, a potential was created with the ground state. The universe is lowering potential and heading back toward the ground state, in a unified way. Gravity is one way; ground state reference push. The pressure and temperature due to gravitational work also causes mass burn via fusion; mass back to energy or celling to floor. The universal red shift is energy moving in the direction of longer and longer wavelength. This is toward the direction of the infinite wavelength of the ground state. All roads head to the same place which is the direction of lowering potential with the ground state.

Current models try to make gravity an independent affect not related to the other forces in a common way, or to the universal red shift. That is vey old school and needs an update.

The second law that states that the entropy of the universe has to increase. This suggests that the ground state is place of lowest energy but the highest entropy. This can be explained with Special Relativity. At the speed of light time, distance and mass become mathematically discontinuous. Space-Time and mass breaks down at the speed of light. Space-time dissociates into separated time and separated space. At the ground state one, can move in space without the constraint of time and move in time without the constraint of space. This allows a state of infinite complexity and infinite entropy. All the energy is absorbed into entropy; ground state.

To create the universe from the ground state at the speed of light; zero available energy, all we need to do is lower, locally, from infinite entropy. This will be very exothermic. This is done by placing limits within a zone of dissociated space and time; merging time and space into space-time. Let there by light! Someday we might tap into this.

[Bored chemist]

If we started with the lowest energy photons, matter and anti-matter pairs will not appear until we reach the highest energy levels. Matter and mass only appear at the celling of energy.

From the point of view of nuclear physics, what you are calling the  ceiling is pretty nearly the floor.
There are plenty of nuclear transitions with energies much greater than the MeV or so needed as the minimum for pair production.

And, it follows from that that your assertion

Gravity is a way for matter to return to the ground state, with the ground state being the speed of light reference at the lowest energy.

makes no sense.

[pasala (OP)]

It is a big question, why don’t light beam continue its journey and what makes it to be deflected from its original path?

It is true that there is gravity in the elevator.  Let us assume that the elevator is divided into four parts and there is gravity uniformly in all parts. 

If you allow a light beam from one hole of the elevator and if the elevator is at rest on the ground it passes through the other hole.  The light beam is passing or moving in the block A where there is gravity.  In other words, light beam is making its journey in a gravity field. 
01  There is uniform gravity in the elevator.
02  Light beam is moving from one end to the other end.
03  Gravity is facilitating or allowing light beam to pass through it.
04  Gravity is not obstructing, but allowing free movement of light through it.

If the elevator accelerates forward:
01  We are lifting the frame only and in turn it lifts the contents there in.
02  Gravity is not moving downwards. 
03  When the elevator’s lower area, block D moves to block A,  Gravity continues to be rest or stationary.  As the elevator moves from one block to other, Gravity medium start merging and its density at the bottom increases.
04  Light source continues to be relative to elevator and thus there is no change or movement.
05  As the elevator accelerates, block A merges with block B and if acceleration continues, A and B merges with C.
06  Light beam propagated in Block A start moving down along with Gravity.
07  Light is coming out with certain amount of force or pressure from light source.  Light particles are not moving straight. 
08  Gravity is not bending light, but light is following path of Gravity. 
09  The medium giving us weight,  and  light are interlinked to each other.
10  It appears that light particles always shift from low gravity to high gravity area. 
11  The medium giving you weight, appears to be one form of energy only.  Light particles easily spreads in this medium. 

Yours
Psreddy

[Kryptid]

It is a big question, why don’t light beam continue its journey and what makes it to be deflected from its original path?

It isn't being deflected. Your acceleration just makes it look that way.

[pasala (OP)]

It is a big question, why don’t light beam continue its journey and what makes it to be deflected from its original path?

It isn't being deflected. Your acceleration just makes it look that way.

You believe that apple is not coming down but Earth only raising upward.