Understanding the Mechanics of Gravity: How and Why It Works

[Nomy-the wanderer]

1) If that is true then how come every body lied to me uptill now that light has no mass.

Of course light has a mass, haven't u heard of the photoelectric effect(which is why einstein have had his nobel prize) light can interact with matter, light has a mass represented in the form of the photons, photons are energy, and Einstein proved mathematically that at the speed of light mass and energy are the same because E=mc²...
And every object that has a mass can be influenced by gravity..

 

[Sam Mason]

Why does everybody think gravity to be a weaker force than the other four fundamentals? granted it cannot hold bodies with the same unquenchable grip as strong nuclear force but I've also never heard of electromagnatism defying the exclusion principle like gravity does in the collapse of a neutron star.

Off topic: does anyone have a clue where i can find out about current theories surrounding singularities and black holes here? I've just decided that singularitys must have either volume or infinite gravity and i want to see if this holds true with current beleif (or a current belief)

 

[Art]

Of course light has a mass, haven't u heard of the photoelectric effect(which is why einstein have had his nobel prize) light can interact with matter, light has a mass represented in the form of the photons, photons are energy, and Einstein proved mathematically that at the speed of light mass and energy are the same because E=mc²...
And every object that has a mass can be influenced by gravity..

Light has 0 mass. Gravity does not affect light directly, it affects the space-time dimensions that light is traveling through. When people refer to light bending in the presence of a massive object this is only a perceived effect. From the lights frame of reference it is traveling in a straight line.

 

[Art]

In school we are taught that gravity is a force of attraction between two bodies. This is very vague, and it bothers me that a broader knowledge of gravity is not "common knowledge". Could someone please explain in deatail the mechanics of gravity, how and why it works?

"If an apple falls, does the moon also fall"
Isaac Newton

The quick answer is according to quantum theory everything, both matter and forces are comprised of 2 families of particles Fermions and Bosons respectively this theory has been very successful so far in explaining matter and the other 3 forces - electromagnetism and the weak and strong nuclear forces. Forces affect matter by the interaction of boson particles. The particles related to gravity have been identified theoretically and given a name - gravitons, but to date physicists have been unable to detect them.

 

[Art]

Off topic: does anyone have a clue where i can find out about current theories surrounding singularities and black holes here? I've just decided that singularitys must have either volume or infinite gravity and i want to see if this holds true with current beleif (or a current belief)

here's a ref for you http://cosmology.berkeley.edu/Education/BHfaq.html

 

[Enos]

I'm too speculative and too far beyond physical review's current level of research, but I say that gravity and electromagnetism are the same force and the same strength. :)

 

[Sam Mason]

Hehehe good luck proving that one Enos :D

But bloody hell you have a good point we just don't have the means to produce strong enough magnets to replicate the gravitational effects of a body the size of a planet ...

And maybe if a proton was gravitationally charged in the same way its electromagnetically charged then it could hold something as small as an electron in check over something as small as the Planck constant ...

I like ur thinking dude :P just going to have a hard time proving it

(Ps thanks for the link Art ... i still havnt looked but itll probably be worthwhile )

 

[Enos]

I just hope I'm right. I'll know for sure in time.