September 1st, 2011, 02:57 PM
Oh my, watched another science programme showing a gravity well in two dimensions.
Showed and described, the gravity well of a black hole as a funnel in the fabric of
spacetime. When will this nonsense stop... Any place I go to on earth at sea level,
gravity is the same. A gravity well has three dimensions, not two, so cannot be
described as a funnel. How can we educate the up coming generation in science,
if we cannot teach them the basics right.
nokton.
It's an analogy, not reality. It's a way to help people grasp a concenpt, not reality.Originally Posted by nokton
Yes, as said, it is an analogy, a tool to illustrate what happens in 3D. Tell me, how would you depict a gravity well in 3D?
The thing is, gravity is a curvature of space. Curvature is a property that even something in only 2D can have and a funnel for a black hole and an indentation on a sheet for non-black hole sources of gravity is the way to depict it as an analogy to the 3D reality. You use the analogy by imagining the perspective of a being that is in the plane of the funnel.
In short, you simply appear to not understand the analogies in the first place.
OK Kalster, consider this, give gravity a colour, say blue, the intensity of which determines the gravitational force about the object,Yes, as said, it is an analogy, a tool to illustrate what happens in 3D. Tell me, how would you depict a gravity well in 3D?
The thing is, gravity is a curvature of space. Curvature is a property that even something in only 2D can have and a funnel for a black hole and an indentation on a sheet for non-black hole sources of gravity is the way to depict it as an analogy to the 3D reality. You use the analogy by imagining the perspective of a being that is in the plane of the funnel.
In short, you simply appear to not understand the analogies in the first place.
from pale blue at a far distance, to dark blue near the surface, the colour depth determined by the gravity of the mass of the object.
Feel you understand, my friend.
nokton.
But gravity is a result of curvature, not some sort of "intensity". What you're describing is not a bad way of representing a gravitational field at all, and it might get across the 3D element rather well if done properly, but it doesn't get across that curvature trait of gravity, which is what we're trying to do when we use the 2D curvature analogy. It serves a specific purpose, your analogy does something a bit different. All analogies are ultimately lacking in some way, I suppose.OK Kalster, consider this, give gravity a colour, say blue, the intensity of which determines the gravitational force about the object,Yes, as said, it is an analogy, a tool to illustrate what happens in 3D. Tell me, how would you depict a gravity well in 3D?
The thing is, gravity is a curvature of space. Curvature is a property that even something in only 2D can have and a funnel for a black hole and an indentation on a sheet for non-black hole sources of gravity is the way to depict it as an analogy to the 3D reality. You use the analogy by imagining the perspective of a being that is in the plane of the funnel.
In short, you simply appear to not understand the analogies in the first place.
from pale blue at a far distance, to dark blue near the surface, the colour depth determined by the gravity of the mass of the object.
Feel you understand, my friend.
nokton.
Of course Bio, but the curve you speak of only occurs within the gravity well, which is uniform within the body mass of the object.But gravity is a result of curvature, not some sort of "intensity". What you're describing is not a bad way of representing a gravitational field at all, and it might get across the 3D element rather well if done properly, but it doesn't get across that curvature trait of gravity, which is what we're trying to do when we use the 2D curvature analogy. It serves a specific purpose, your analogy does something a bit different. All analogies are ultimately lacking in some way, I suppose.OK Kalster, consider this, give gravity a colour, say blue, the intensity of which determines the gravitational force about the object,Yes, as said, it is an analogy, a tool to illustrate what happens in 3D. Tell me, how would you depict a gravity well in 3D?
The thing is, gravity is a curvature of space. Curvature is a property that even something in only 2D can have and a funnel for a black hole and an indentation on a sheet for non-black hole sources of gravity is the way to depict it as an analogy to the 3D reality. You use the analogy by imagining the perspective of a being that is in the plane of the funnel.
In short, you simply appear to not understand the analogies in the first place.
from pale blue at a far distance, to dark blue near the surface, the colour depth determined by the gravity of the mass of the object.
Feel you understand, my friend.
nokton.
I was speaking hypothetically if you will, about colour, was trying to portray colour as a means of explaining increasing gravity
around a massive object in 3D. Gravity, my friend, is not the result of curvature, rather the cause of it.
Enjoy contact with you Bio, hope it will continue.
nokton.
You sure about that? I thought that mass is the cause of spacetime curvature, and that gravity is a consequence of that curvature, and therefore a consequence of mass.
Wrong. TheBiologista has it right.
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