Newtonian theory or relativity theory?They not both indicate that light rays bends with Gravity?

Question

Except Einstein calculation showed a lower margin of error.?

The newtonian calculation indicated 1/2 the angle Einstein's calculation predicted?So light rays must have contained mass.?

massless bending?it that true= my problem can I able to bend anything with out a mass?

Is it possible without an absolute reference point of measurement to measure anything?

Answer 1

Correct!

The angle of deflection using Einstein's theory was different from the Newtonian by a factor of 2

Newton's prediction:

2GM/c^2d

Einstein's prediction:

4GM/c^2d

when measured during the Eclipse in 1922 Einstein's theory predicted that exact amount.. So Ensten's theory is more precise than Newton's.. However Newton's laws of motion and Gravity are still being used as they are very precise when dealing with smaller velocities

Well for the other part

E=mc^2 suggests that anything with energy can bend spacetime, even light itself even if it has no mass

Without relativity and Using only Newton this can not be explained, newton also predicted massless light... Newton's law do not have the gamma factor, that is why it has this difference

For the last part of your question, as a Phycist i can only tell you that nothing is absolute. A simulteneous event may not be simultaneous measured at another reference point.. So different reference points give different absolutes.. This is relativity.. when measuring something or an event the reference point must always be stated.

Also, as explained above light can bend spacetime as can other massless forms.... But it surely cannot bend a piece of iron, right? The formula also describes how astonishing and huge the amount of energy a mass has while at rest.

The formula above applies only to single particles when they are at rest, and also systems at rest (i.e., systems when seen from their center of mass frame). This is why a photon let's say is said to be massless (light is always travelling), it can never be brought to rest so it does not effectively have a mass but still can have a variety of energies

Answer 2

No, the difference between Einstein's Theory of General Relativity and Newton's Theory is far beyond just a matter of precision of measurement. Here are some of the differences:

1. Newton assumed that time and space is absolute, meaning that passage of time is the same for all observers and that the very distant background of stars provides an universal reference frame for which all motion can be measured against (i.e. a preferential reference frame).

Einstein assumed that there is NO preferential reference frame, and discovered that with the additional assumption that the speed of light is constant for all reference frames, time is actually relative depending on the speed of the observer. This has been verified to be true beyond a shadow of doubt.

2. Newton's laws of motion is based on the premise that gravity is a force, and extends its influence through space and acts on other matter instantly with no delay.

Einstein's General Relativity discovered that gravity can be viewed as the warping of spacetime, and that spacetime can be viewed as a fabric of reality that can interact with matter via gravity. This completely overturns Newtonian physics, where space and time is dead and non-changing.

Also, Einstein discovered that gravity, like light, can only exerts its influence at a certain speed (i.e. the speed of light). Therefore, if the Sun were to disappear this very instant, it will take about 8 minutes before anyone here on Earth will notice.

Answer 3

I have a problem with the idea that photons have no mass.
E = MC^2
If M, the mass = 0, then E = 0(C^2) or 0 Then the energy of light would be 0 which is obviously false.

Answer 4

Yes light bends with gravity because light has mass. Its mass can be found from E/c^2 where E is the energy of the photon. Just because photons have 0 rest mass does not mean that the have no mass. The bending of light around the sun was one of the proofs of this.

Answer 5

Since light is electro magnetic in nature it can be bent if it passes through a magnetic field. The bending force would be at right angle to the direction of the light.

Answer 6

Newtonian mechanics have *nothing* to do with light. Newtons laws are merely special cases of relativity when the velocities involved are low compared to the speed of light.


Doug

Answer 7

Newton knew that gravity is a rigidity even as Einstein took a step ahead via asserting that warps and curves might want to be the source of the rigidity. products shifting by ability of area might want to have a tendency to fall into each and every others warps of "area-time" (Einstein's area-time warp). Newton (did not see the warp) sees the falling/attracting behaviour a rigidity.