dulrich said:I am curious how you would "adjust" a body to change its mass at all. An object with zero mass must move at the speed of light or it wouldn't exist at all.
cubud said:I just wanted to know if objects without mass will always be traveling at the speed of light.
There is more than one sort of mass in relativity, e.g. "invariant mass" and "relativistic mass". Most physicists nowadays mean "invariant mass" when they say "mass". "Relativistic mass" is really just another name for "energy" (divided by c2) and the term is deprecated.FeDeX_LaTeX said:Why not faster? I was told that the photon traveled at the speed of light but it has a very, very small mass that is almost negligible (but still exists). So why wouldn't a smaller mass go faster?
"No mass objects" refer to objects that do not have any physical mass, such as light particles or virtual particles. They differ from regular objects in that they do not have a physical form or structure that can be measured or observed in the same way as regular objects.
Yes, "no mass objects" can remain stationary in a specific reference frame. This is because they do not have any physical mass to move or accelerate, so they can remain stationary in relation to a specific observer or reference point.
"No mass objects" can interact with regular objects through forces such as electromagnetic interactions. For example, light particles can interact with physical objects and cause them to move, even though the light particles themselves do not have any physical mass.
Yes, "no mass objects" can have momentum, even though they do not have any physical mass. This is because momentum is a measure of an object's motion, and "no mass objects" can have motion through interactions with other objects.
"No mass objects" challenge our understanding of the fundamental principles of physics, such as the conservation of mass and the concept of inertia. They also have important implications for fields such as quantum mechanics and relativity, and are being studied in ongoing research to further our understanding of the universe.