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silvercats
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...a mass? not matter how fast it hits an object, it doesn't have mass. F=ma.
(explain without any equations or without too many equations.)
(explain without any equations or without too many equations.)
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silvercats said:...a mass? not matter how fast it hits an object, it doesn't have mass.
(explain without too many equations.)
F=ma.
The photon has mass. The photon doesn't have rest mass.silvercats said:...a mass? not matter how fast it hits an object, it doesn't have mass. F=ma.
(explain without any equations or without too many equations.)
With QM there's no "F=ma". waves interact with others and can change momentum p and energy E (that are related with wavelenght or frequency). photon has momentum and energy it has (wavelenght or frequency) as other particles.silvercats said:...a mass? not matter how fast it hits an object, it doesn't have mass. F=ma.
(explain without any equations or without too many equations.)
My main defense is that Einstein used the concept of relativistic mass. However, I acknowledge that the idea has a few problems with it. I find the relativistic mass concept useful as a heuristic model.ZapperZ said:Darwin123: your explanation adds a lot of confusing contradiction here. "Relativistic mass" in SR is simply defined as
m = gamma m_0
But yet, for a photon, the rest mass m_0 is zero. So already this "relativistic mass" being non-zero is inconsistent.
A photon has momentum. That should be sufficient to show why it can interact. The next logical step is to show why something with zero mass can have a momentum. This is gives us the opportunity to introduce a more general idea of what a "momentum" is.
Please note that there are plenty of supporting arguments on why the concept of "relativistic mass" should not be used, both in the teaching of SR, and also when we deal with general question such as this. I had already outlined this (with references) in another thread.
https://www.physicsforums.com/showthread.php?t=642188
Zz.
silvercats said:aha it means that, there are particles and things that photos are made of but it ONLY DOES NOT interact with the higgs field, right?
In theory photons can also acquire mass through the Higgs mechanism working through gauge bosons in case of spontaneous symmetry breaking.silvercats said:aha it means that, there are particles and things that photos are made of but it ONLY DOES NOT interact with the higgs field, right?
the reason for that might be?
The movement of a photon is not dependent on its mass, but rather on its energy and momentum. Photons are particles of light that travel at the speed of light, which is a fundamental constant in the universe. This means that even though photons have no mass, they can still transfer energy and momentum to other objects, causing them to move.
According to Einstein's theory of relativity, mass and energy are interchangeable. Since photons have energy (in the form of light), they also have momentum. This is known as the photon's relativistic mass, and it is a result of the photon's high energy and speed.
When a photon interacts with an object, it can either be absorbed or reflected. In the case of absorption, the photon's energy and momentum are transferred to the object, causing it to move. In the case of reflection, the photon bounces off the object, transferring its momentum and causing the object to move in the opposite direction.
Yes, a photon can move something as large as a person. This is because the transfer of energy and momentum is not dependent on the size or mass of the object. As long as the photon has enough energy and momentum, it can cause an object of any size to move.
The laws of motion, as described by Newton's laws, still apply to the movement of objects caused by photons. However, the presence of photons and their unique properties, such as having no mass, may require a more comprehensive understanding of these laws and how they apply to different situations.