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Oct 30, 2019 · If 1eV of photon is absorbed by an object with 100eV of energy, its energy will be 101eV. And yes, we can convert energy into mass. That's what happens inside particle collider.
To be precise, photons are not said to have mass, they are said to have "rest mass" zero and they are said to have "relativistic mass". Both terms are intricate, and the following remarks might not explain:
- How Do We Know That Photons Are massless?
- Does A Photon Even Have Momentum (and why)?
- Formula For The Momentum of A Photon
- Momentum of A Photon According to Quantum Mechanics
First of all, how can we even know that photons are actually massless? In short, the special theory of relativity predicts that photons are massless simply because they travel at the speed of light. This is also backed up by the theory of quantum electrodynamics, which predicts photons to be massless as a result of gauge symmetries and the Higgs me...
Now, to answer this question, we need to know what a photon actually fundamentally is. You may already be aware of the fact that light consists of electromagnetic waves. This wave nature of light, however, is unable to explain some phenomena, such as the photoelectric effect, where a light beam can actually scatter off electrons from a piece of met...
Now, based on classical Newtonian mechanics and the formula p=mv, a photon would not have any momentum as it has no mass. So, Newtonian mechanics must be incorrect in this case. We’ll need something more fundamental, the theory of special relativity. The goal is to find a definition for momentum expressed in terms of energy that is not dependent on...
If we really wish to consider the energies and momenta of particles, such as photons, we do have to take into account quantum mechanics as well. A photon is, after all, an elementary particle. The first thing to do is to actually forget the above definition for energy, E=γmc2and rather consider a more fundamental, quantum mechanical equation for th...
In short, the special theory of relativity predicts that photons do not have mass simply because they travel at the speed of light. This is also backed up by the theory of quantum electrodynamics, which predicts that photons cannot have mass as a result of U (1) -gauge symmetry.
Nov 21, 2024 · Energy and Frequency Relationship: A photon’s energy is directly related to its frequency through the equation, E = hν, with higher frequencies corresponding to higher energies. Lack of Mass and Charge: Photons are massless and uncharged, allowing them to travel at light speed and interact without experiencing resistance due to electric forces.
No, a photon really does have zero mass. You can think of it as a particle of "pure energy" if it helps you make sense of it, but the only sense in which that is valid is that a photon has energy but no mass. Yet, if my understanding is correct, the mass of a moving object/particle increases in proportion to its speed/velocity...
If a photon enters matter with an energy in excess of 1.022 MeV, it may interact by a process called pair production. The photon, passing near the nucleus of an atom, is subjected to strong field effects from the nucleus and may disappear as a photon and reappear as a positive and negative electron pair.
