 # Question: Can Gravity Exist Without Mass?

## How does gravity bend light if it has no mass?

While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity.

This is not because the mass pulls on the photons directly, but instead because the mass warps the space-time through which the photons travel..

## How much mass is required for gravity?

Secondly, gravity (in the Newtonian paradigm) is a force between two masses. If two astronauts are in orbit together and experience no other forces, they will eventually be pulled together by their mutual gravitation for each other. There is no minimum mass for gravity’s action.

## Can gravity be proven?

Most everyone in the scientific community believe gravitational waves exist, but no one has ever proved it. That’s because the signals from gravitational waves are usually incredibly weak.

## Is gravity a pulling force?

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.

## Does light have gravity?

Light has energy, energy is equivalent to mass, and mass exerts gravitational force. Thus, light creates gravity, i.e. the bending of space-time. … Thus, in order for light to generate a gravitational field like that of the Earth, it would need to have the mass (energy) of the Earth.

## Does graviton have mass?

Gravitons do indeed have mass, and their motions generate kinetic energy. … Other particles have mass, but they are much larger, much less numerous, and cannot substitute for the gravitational effects which generate space curvature. The great mystery of so-called force at a distance is explained by the mass of gravitons.

## Does gravity need mass?

In the theory of gravity as laid out by Newton, mass is the reason for gravity. An attractive force exists between any two masses and causes both the motion of planets and the falling of objects near the Earth’s surface. … First, anything with energy can produce gravity or be affected by it, without the need for mass.

## Did Einstein believe in gravity?

Einstein argued that gravity isn’t a force at all. He described it as a curvature of time and space caused by mass and energy. … Their math, laid down in 10 equations, explained how gravity could move around objects via a warped reality, accelerating without ever feeling any mysterious Newtonian forces.

## Is gravity a wave or particle?

Gravity is a force. For all other forces that we are aware of (electromagnetic force, weak decay force, strong nuclear force) we have identified particles that transmit the forces at a quantum level. In quantum theory, each particle acts both as a particle AND a wave.

## Can time be bent?

Also, under Einstein’s theory of general relativity, gravity can bend time. … When anything that has mass sits on that piece of fabric, it causes a dimple or a bending of space-time. The bending of space-time causes objects to move on a curved path and that curvature of space is what we know as gravity.

## Is gravity a real force?

In general relativity, gravity is a fictitious force. In classical mechanics, fictitious forces are not considered “real” forces. … If you believe that inertial forces are forces, then gravity is a force. If you believe that inertial forces are not forces, then gravity is not a force.

## Can gravitons be dark matter?

“Why couldn’t dark matter be gravitons? Gravitons are undefined as is dark matter. We know dark matter has gravity.

## Has a graviton been found?

One consequence of that: while scientists know of particles associated with the strong, weak and electromagnetic forces, they have yet to discover a particle of gravity, or graviton.

## Does light interact with gravity?

Yes, light is affected by gravity, but not in its speed. … Gravity bends light by warping space so that what the light beam sees as “straight” is not straight to an outside observer. The speed of light is still constant.