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9h
comment Why is the intensity of an alpha ray constant along a material?
Question that might lead you to the answer: what are the units of intensity used here? Several different definitions are possible, and the correct answer depends critically on which is chosen.
14h
comment Why do some stars actually produce “Gamma ray bursts”?
As I understand it (very vaguely, that is) the detail is a mess of non-linear math arising the magnetohydrodynaimcs. How's your math and at what level would you like to be answered?
1d
comment How can a moving point charge “update” its fields without emitting an e-m wave?
To put @CuriousOne's comment is plainer language: turn the question around. How can an observer move in the field of a stationary charge without the charge emitting EM waves? It's the same question because there is no uniquely identifiable state of rest.
1d
comment Is this a good PhD Thesis Topic in General Relativity?
My best suggestion for advice from the assembled masses of Physics SE is to answer a question or two in order to accumulate the rep needed to participate fully in chat and then bring the subject up in the h bar.
1d
comment How does one actually use the Einstein field equations?
With great difficulty?
1d
comment Light from Absolute 0
An assumption of instantaneous cooling to absolute zero violated the 3rd law of thermodynamics. It is seriously time for you to quit throwing idea together at random and hoping that they add up to something. Go forth and learn systematically for a while. Find out a little about how notions in physics are connected to one another and how they depend on preconditions. That is to say make yourself part of the audience of this site: "Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics and astronomy."
1d
comment Cold Solid Matter at the End of a Black Hole's Acceleration Disk?
Word soup and pictures of equation soup don't make a good question.
1d
comment Why do we see discrete light spikes coming out from a light source?
Perhaps more direct than Johns link is: physics.stackexchange.com/questions/35935/…
1d
comment De-broglie wavelength
You should read the links that John has given. The "homework" policy is currently construed to apply to a class of problems that are perceived to be homework-like with taking notice of how you can about them.
1d
comment Rest mass of particle of light
BTW--I know that the question asked he is not precisely the same as that asked in the duplicate, but the same understanding is needed to answer both and that duplicate has become are de facto canonical question on photon mass, energy and momentum. You'll find a few additional answer in questions from the "linked" sidebar of the master question.
2d
comment What are these cycles in orbital eccentricity called?
If they are accurate (rather than features of a problem with your simulations), then taken together with some other factors (precession of the equinoxes...) they go by the collective name Milankovitch cycles. That article might break out the individual contributions for you, but I am officially out of my depth.
2d
comment Calculate the Bohr radius of a muonic atom
Possibly useful to you: physics.stackexchange.com/search?q=reduced+mass+is%3Aq
2d
comment If you play more than one music track at once on a computer, does the sound heard get louder?
Nice expansion.
2d
comment If you play more than one music track at once on a computer, does the sound heard get louder?
@user31782 That's essentially a physiology or cognitive question with a small but important amount of physics input in the form of noticing that the cochlea detects the frequency-space power components of the signal (i.e. it detects the Fourier transform of the time-dependent pressure function).
2d
comment If you play more than one music track at once on a computer, does the sound heard get louder?
This is correct as long as you don't allow the net amplitude to be clipped by the limits of the sound system at any time. But I fear it is so terse as to only be comprehensible to people who could have deduced it for themselves.
2d
comment If you play more than one music track at once on a computer, does the sound heard get louder?
In a lot of ways this is a technology question rather than a physics one. Some might argue that because the sound system is designed correctly you can treat it as two physical sounds sources and analyze it on that basis, but the reliance on design doesn't make me (personally) happy.
Feb
5
comment How to determine likelihood of baryon decay
By "probability" do you mean the branching ratio or something else? Also the expression involving $J^{PC}$s is pretty messed up. Maybe you could clarify that. Note that enclosing math in pairs of double-dollar-signs $$ will get block-set equations.
Feb
4
comment Cherenkov radiation can it happen in a jar using tap water with 8 thorium laced lantern mantles as a radiation source
The vitreous humor generates Cerenkov radiation every time a cosmic muon passes through the eyeball itself. Alas, given the size of the eye, the middling QE of the light sensitive pigments and the need for multiple nearby hits to register consciously, the vast majority will never register. To try it, go far enough into a shallow cave to find complete darkness, wait for adaption, lay on your back. Depending on depth you might expect as many as 1 cosmic muon with good geometry in each eye every 20 seconds or so. But I think that you will register only a few percent at best and without color.
Feb
4
comment Cherenkov radiation can it happen in a jar using tap water with 8 thorium laced lantern mantles as a radiation source
The easy way to see Cerenkov radiation with the unaided eye is to locate the nearest university with a "test reactor" and try to arrange a tour. Such reactors used to be quite common in US, but have grown a little more sparse in the last few decades. I conjecture that there are some to be found in other countries that use nuclear power as well. Getting a tour can be anywhere from as simple as asking up to fairly difficult without an on-going relationship.
Feb
3
comment Cold Fusion and Black Holes
Please do not use comments to disparage other users even by implication.