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All particles that move slower than the speed of light have a "rest mass" or "invariant mass" - and that means, almost all particles. One of the few particles that does NOT have a rest mass is the photon, since it moves at the speed of light. It does have energy, and therefore (by mass-energy equivalence) it also has mass, but this is not "rest mass" and is often not counted as mass.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoIn our Universe, a photon can exist without mass, whether we like it or not. We didn't write the rules for this Universe, so, no matter how much we may not like the fact, photons do not have mass.
So, to the same extent that electrons behave like waves, and photons "know" whether or not we are trying to determine which slit they went through, photons have no mass. It's just one fact about our Universe we have to live with.
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What are the subatomic particles with no mass called?
All subatomic particles have mass.
How do you find the number of particles in a compound when given the mass?
The mass is the number of particles. Especially with atoms on the periodic table. The atomic mass is the number of proton and neutrons in the nucleus.
What have no mass?
Now, all the particles are considered as having a mass (including photons).
What is the reason particles have mass?
Particles have mass because they are matter, and matter is anything that has mass and takes up space. The wave packet that defines the particle is of such high frequency that its energy has a gravitational vector.
Do protons and plasma particles have about the same mass?
Protons and plasma particles are very different objects.
Is it possible to measure the mass of a sunbeam?
Photons are considered as particles without mass.
What are subatomic particles with no mass?
The photons and neutrinos are considered without mass although they have a very small mass.
What are the subatomic particles with no mass called?
All subatomic particles have mass.
How can particles exist without mass?
People are sometimes confused by the assertion that photons, neutrinos, or other particles have a rest mass of zero. These particles are never at rest, so their rest mass is a purely theoretical concept. All particles have mass, there are no exceptions. It can be a very small amount of mass, as is the case for a photon, but there is some mass. A photon can also be described as being composed of energy, but remember that there is a mass-energy equivalence, as described by Einstein's famous equation, e=mc2. If a particle has energy, it therefore also has some amount of mass.
Would a massless body have inertia?
Not a single body is present in this universe without mass but they can be weight less.By definition, mass is the measure of the inertia of a body, so if the body were without mass (as some particles, for example), it would have no inertia.
What is mass determinded by?
The amount of particles in the object. The more particles, the bigger the mass.
Is mass is extensive or intensive?
Mass is an extensive property. Because it depends upon on no of particles. No particles changes mass changes.
What are mass particles?
Particles that are heavy. Mass is like MASSive (massive) and massive objects could be heavy.
Is a blueberry pancake a heterogeneous?
Definitely yes. Look at it: does it contain different particles or is it a goo mass of one color without a texture?
Which subatomic particles have mass and re included in the calculation of the atomic mass number?
These particles are protons and neutrons; but to be correct the mass of electrons must be added.
In Bohr's model which particles make up the most mass of the atom?
the electron particles make up the mostr mass
How do you do mass to particles?
By particles, I assume you mean atoms. Firstly, you divide mass by molecular mass to get moles. Then multiply moles by avagadros number to get amount of atoms
