All Questions
19
questions
0
votes
1
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55
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How to calculate the change of the density of photons in different frames?
I have a problem in getting the transformation of the intensity of light.
1>> Using the transformation of the energy-momentum tensor $T^{ik}$, we can obtain
We have used the fact that $T^{00}=W$...
- 1
-1
votes
1
answer
47
views
Does photons accelerate from $0$ to $c$? [duplicate]
I recall that whenever an electron in a higher-than-normal orbit falls back to its normal orbit and produces photon. So shouldn't the photon accelerate from 0?
1
vote
2
answers
92
views
Does Proca's hypothesis make sense of giving mass to the photon in reference to special relativity?
The Romanian physicist Proca formulated his famous Lagrangian to describe a hypothetical massive photon. From it we derive, as equations of motion, the relations that the electric and magnetic fields ...
- 11
-1
votes
1
answer
76
views
Why doesn't a photon lose energy according to $E=mc^2$? [duplicate]
As photons are massless thus by $E=mc^2$,
the energy should be zero right? or should it be?
I would be pleased to be corrected
- 33
0
votes
4
answers
607
views
Why does the speed of light in vacuum never change? [duplicate]
why does the speed of light in vacuum never change? Under any circumstances, The speed of light in vacuum never change, why?
- 57
2
votes
3
answers
182
views
Why doesn't light bend in a box travelling at constant velocity like in an accelerated box?
If a box is accelerating in x direction and if a photon comes from the y direction then its entry and exit point will not lie in the same line that is the the path of the photon is curved because at ...
- 1,278
1
vote
1
answer
110
views
Do all photons have the same proper time in different environment?
All photons have the same speed. In "space" (I mean when there is practically no matter) a photon will travel a distance faster than a photon in matter. But the speed is still the same.
Do 2 photons ...
- 121
6
votes
6
answers
4k
views
Frequency of light versus frequency of electron vibration
I've been trying to understand photons and light, although entirely conceptually (layman with not much of a background here, but I really want to understand this a bit better) and there's a couple of ...
- 3,075
1
vote
6
answers
192
views
Is 'photons being massless' the reason everyone observes their speed to be the same?
When a man on a train throws a ball, the resultant velocity of the ball (as seen from ground) is the sum of the velocity of the train and the velocity imparted to the ball from the throw.
However, if ...
- 6,355
3
votes
2
answers
136
views
Can light go slower? [duplicate]
In a vacuum, are photons always traveling at 100% light speed? Can photons go any slower in a vacuum? They have no mass which means they can go at 100% light speed, but do they have to?
0
votes
2
answers
59
views
Nature of Photons & electromagnetic spectrum [closed]
Since photons are massless, how are they considered as particles? Are there similar particles for the range of electromagnetic spectrum?
- 11
-2
votes
1
answer
348
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What propels the photon, it must be some force? [closed]
If the classification of "photon" is universal then surely the energy force requirements for any protons initial "take off" would likewise. Fire flies and exploding stars? Surely the propellant force ...
- 15
4
votes
2
answers
289
views
Is the existence of a photon relative? [duplicate]
If an observer passes an electron, in such a way that the observer is accelerating, the observer would see photons because accelerating charges induce electromagnetic waves.
But from point of view of ...
- 3,348
0
votes
3
answers
385
views
Acceleration of radio waves
Is it possible to accelerate the speed of radio waves? If so then how? Radio waves go at the speed of light.
5
votes
3
answers
453
views
Nature of light in Special Relativity
What is the nature of light in the context of Special Relativity? Is it a photon, or an electromagnetic wave, or something else?
I have doubts, because a photon seems to me a quantum mechanical ...
- 407