Can gravity exist without mass?

The only way to get gravity is with mass. The more mass, the more gravity you get. Without mass, you can't have gravity.

Is gravity only based on mass?

The answer is gravity: an invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. Anything that has mass also has gravity. Objects with more mass have more gravity.

Can something without mass exist?

If a particle has no mass (m = 0) and is at rest (p = 0), then the total energy is zero (E = 0). But an object with zero energy and zero mass is nothing at all. Therefore, if an object with no mass is to physically exist, it can never be at rest.

Does everything exist mass?

Everything that can be directly measured has mass, because everythign that exists has some energy, and energy and mass is the same thing, as per E=mc^2.

Does light have mass?

The short answer is "no", but it is a qualified "no" because there are odd ways of interpreting the question which could justify the answer "yes". Light is composed of photons, so we could ask if the photon has mass. The answer is then definitely "no": the photon is a massless particle.

Why Gravity is NOT a Force

How does gravity exist?

Einstein suggested that the shape of spacetime is what gives rise to the force we experience as gravity. A concentration of mass (or energy), such as the Earth or sun, bends space around it like a rock bends the flow of a river.

How do we know gravity exists?

Gravity is a force between two masses, so gravity exists wherever there is mass. To discover when gravity started to exist, we need to understand what mass is, and when it started to exist. Let's dive right in: “mass” is what we use to measure how much “matter” there is.

Do gravitons exist?

In an attempt to marry gravity with quantum theory, physicists came up with a hypothetical particle—the graviton. The graviton is said to be a massless, stable, spin-2 particle that travels at the speed of light. The graviton remains hypothetical, however, because at the moment, it's impossible to detect.

Can gravitons travel faster than light?

Even if gravity crosses the event horizon, it can not be said to travel faster than light.

Why quantum mechanics Cannot explain gravity?

There are simply too many possible configurations of both the interactions and the underlying space-time. We can't make the math simple enough to solve; our mathematical models lose their predictive power.

How fast is a tachyon?

Tachyons are one of the most interesting elements arising from Einstein's theory of special relativity. The 1905 theory is based on two postulates, nothing with mass moves faster than the speed of light (c), and physical laws remain the same in all non-inertial reference frames.

Does light have gravity?

Light has momentum and energy, so it is a source of gravity.

Why does mass create gravity?

According to theory, the reason mass is proportional to gravity is because everything with mass emits tiny particles called gravitons. These gravitons are responsible for gravitational attraction. The more mass, the more gravitons.

Does zero gravity exist?

There is no such thing as zero gravity in space. Gravity is everywhere in the universe and manifests itself in black holes, celestial orbits, ocean tides, and even our own weight.

Where gravity does not exist?

Mystery Spot, Santa Cruz, California

The Mystery Spot in California is one of the many gravitational anomalies that you will find around the world. Discovered in 1939, this spot was opened to the public in 1940. Within the mystery area, you will be amazed to witness that the laws of gravity actually don't seem to work.

Why does mass exist?

The strong force and you

These particles are each made up of three quarks moving at breakneck speeds that are bound together by gluons, the particles that carry the strong force. The energy of this interaction between quarks and gluons is what gives protons and neutrons their mass.

How did Einstein explain gravity?

Einstein did. He theorized that a mass can prod space plenty. It can warp it, bend it, push it, or pull it. Gravity was just a natural outcome of a mass's existence in space (Einstein had, with his 1905 Special Theory of Relativity, added time as a fourth dimension to space, calling the result space-time.

What is true gravity?

Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe.

Does space have gravity?

Is There Gravity in Space? Gravity causes every object to pull every other object toward it. Some people think that there is no gravity in space. In fact, a small amount of gravity can be found everywhere in space.

Can gravity bend time?

Gravitational time dilation occurs whenever there is difference in the strength of gravity, no matter how small that difference is. The earth has lots of mass, and therefore lots of gravity, so it bends space and time enough to be measured.

Do black holes have gravity?

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Why are black holes invisible?

Black holes are so massive that not even light can escape their gravitational pull, so by their nature they are invisible.

What's the speed of dark?

Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light.

Can tachyons escape a black hole?

Since the disturbance of a localized tachyon cannot spread faster than c, it therefore cannot escape the inside of a black hole's event horizon.