Exactly. They are not massless particles.Christofer Br said:Most of the mass of matter comes from energy of strong force interactions between quarks. However the quarks still have intrinsic mass.
Yes, a photon is massless but is subject to gravityOther particles have no intrinsic mass but still have energy.
Because they don't HAVE mass, they have energy.So according to mass-energy equivalence, these particles should still have effectively mass, to my understanding. If so, how can we label a particle as massless or not if they all have mass due to energy they carry?
Quarks are not massless.Doesn't mass of quarks come from energy too?
That is correct, sort of. Gravity is the curvature of space-time and that "curvature**" is a result of the stress-energy tensor of an object.Christofer Br said:So what it boils down to is gravity acts on both energy and mass, but they're not the same thing, there's no "duality" there?
Yes, energy "acts like mass" in that sense. If you weigh a box of gas and then heat it up, it will weigh more.Does energy resist acceleration in the same sense that mass resists acceleration, giving it a finite value (F=m*a)?
A massless particle is a type of subatomic particle that has no rest mass, meaning it does not have any intrinsic mass at rest. These particles are always moving at the speed of light and are described by the theory of special relativity.
The most well-known example of a massless particle is the photon, which is the particle that makes up light. Other examples include the gluon, which is responsible for holding quarks together in protons and neutrons, and the graviton, which is a theoretical particle that is thought to mediate the force of gravity.
Massless particles are observed to travel at the speed of light, which is a fundamental constant in the universe. This means that they have no rest mass, as objects with mass cannot reach the speed of light. Additionally, experiments such as the Large Hadron Collider have confirmed the existence and properties of massless particles.
Based on our current understanding of physics, massless particles are indeed truly massless. However, some theories, such as string theory, propose that these particles may actually have a very small mass that is undetectable by current technology. This is still a topic of ongoing research and debate in the scientific community.
The existence of massless particles plays a crucial role in our understanding of the fundamental forces and interactions in the universe. It also has implications for the behavior of light and the properties of matter. The study of massless particles continues to contribute to our understanding of the laws of physics and the nature of the universe.