>> ^garmachi:

It's been many years since I studied physics. What does the lowercase gamma in the bottom left represent?




Me to, I think the answer is in here, but eff if I can remember.

Edit: ok I think it is the "Lorentz factor" . 7.089 Lorentz factor is 0.990 ratio to the speed of light (or very very close)

It's been many years since I studied physics. What does the lowercase gamma in the bottom left represent?

I watched it again, and they're not saying that radio waves are pink, they're saying that you can't see them... but that pink fills the spot on the colour wheel that would otherwise be filled by the invisible radiation.

They could've made it clearer, but they didn't say what you thought. What they did say isn't exactly wrong just not clear.

Fair enough that it's hardly worth counting UV vision in certain lens enhanced people, I just thought it was cool.
In reply to this comment by FlowersInHisHair:
>> ^oritteropo:

I think they mean that if you try to wrap the visible spectrum around a colour wheel, then it works for the red,green,blue,violet part and then stops working when you get to the magenta/pink/negative green part.
To quibble a little with your claim that anything out of the visisble spectrum is invisible, people who have had cataract surgery can see potentially light slightly outside the normal visible range (all right, not gamma rays, but still)... http://www.answerbag.com/q_view/605905
>> ^FlowersInHisHair:
The claim made in the video that we see all the non-visible wavelengths of light/EM radiation as pink is patently false. We know this because gamma rays aren't pink, they're invisible.


That's not what they're saying though. They are quite clearly saying that the vast area outside the tiny wavelengths we can see are perceived by human eyes as pink. If that were true, there would be so much light bouncing around that that we percieved as pink that we wouldn't be able to make anything else out.

And I quibble with your quibble: anything outside of the visible spectrum is invisible by definition, isn't it? The slight increase in the visible spectrum in a minority of the people who've ever had cataract surgery is hardly worth counting in this regard as it's not considered normal vision.

>> ^oritteropo:

I think they mean that if you try to wrap the visible spectrum around a colour wheel, then it works for the red,green,blue,violet part and then stops working when you get to the magenta/pink/negative green part.
To quibble a little with your claim that anything out of the visisble spectrum is invisible, people who have had cataract surgery can see potentially light slightly outside the normal visible range (all right, not gamma rays, but still)... http://www.answerbag.com/q_view/605905
>> ^FlowersInHisHair:
The claim made in the video that we see all the non-visible wavelengths of light/EM radiation as pink is patently false. We know this because gamma rays aren't pink, they're invisible.


That's not what they're saying though. They are quite clearly saying that the vast area outside the tiny wavelengths we can see are perceived by human eyes as pink. If that were true, there would be so much light bouncing around that that we percieved as pink that we wouldn't be able to make anything else out.

And I quibble with your quibble: anything outside of the visible spectrum is invisible by definition, isn't it? The slight increase in the visible spectrum in a minority of the people who've ever had cataract surgery is hardly worth counting in this regard as it's not considered normal vision.

I think they mean that if you try to wrap the visible spectrum around a colour wheel, then it works for the red,green,blue,violet part and then stops working when you get to the magenta/pink/negative green part.

To quibble a little with your claim that anything out of the visisble spectrum is invisible, people who have had cataract surgery can see potentially light slightly outside the normal visible range (all right, not gamma rays, but still)... http://www.answerbag.com/q_view/605905
>> ^FlowersInHisHair:

The claim made in the video that we see all the non-visible wavelengths of light/EM radiation as pink is patently false. We know this because gamma rays aren't pink, they're invisible.

The claim made in the video that we see all the non-visible wavelengths of light/EM radiation as pink is patently false. We know this because gamma rays aren't pink, they're invisible.

But massive particles would still be prohibited from traveling faster than the speed of light. It's only the particles with imaginary mass that could travel faster, and they would still fit into the framework of special and general relativity.

Unless we at the same time can show that the neutrinos have non-complex mass. Then it could get really hairy. But I wouldn't bet my house on it.

In reply to this comment by juliovega914:
An exaggeration, yes, but not a terribly big one. Most of the standard theory today is based on the bricks of special and general relativity. For us to have to rethink the laws restricting mass from traveling over the speed of light, we really would need to rethink physics from there all the way back up, which really leaves no physical theories safe all the way back to Newtonian physics. In short, I cant wait to see how this pans out.

In reply to this comment by Ornthoron:
Oh, it would definitely be groundbreaking. One of the biggest discoveries in physics to date. But to say that we would have to restart physics is an exaggeration.

In reply to this comment by juliovega914:
I'm pretty sure negative mass would still result in complex energy, because the Lorentz transformation factor would still be proportional to 1/i or -i. Complex mass, however, would allow for the energy to be real (which has been theorized as being possible), but that introduces a whole new problem of trying to conceptualize complex mass.

And on a side note, the first ever physical observation of nonpostive/nonreal mass would be groundbreaking in its own right.

In reply to this comment by Ornthoron:
The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.

>> ^juliovega914:

>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html
for those of you who dont know wtf I am talking about)

An exaggeration, yes, but not a terribly big one. Most of the standard theory today is based on the bricks of special and general relativity. For us to have to rethink the laws restricting mass from traveling over the speed of light, we really would need to rethink physics from there all the way back up, which really leaves no physical theories safe all the way back to Newtonian physics. In short, I cant wait to see how this pans out.

In reply to this comment by Ornthoron:
Oh, it would definitely be groundbreaking. One of the biggest discoveries in physics to date. But to say that we would have to restart physics is an exaggeration.

In reply to this comment by juliovega914:
I'm pretty sure negative mass would still result in complex energy, because the Lorentz transformation factor would still be proportional to 1/i or -i. Complex mass, however, would allow for the energy to be real (which has been theorized as being possible), but that introduces a whole new problem of trying to conceptualize complex mass.

And on a side note, the first ever physical observation of nonpostive/nonreal mass would be groundbreaking in its own right.

In reply to this comment by Ornthoron:
The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.

>> ^juliovega914:

>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)

Oh, it would definitely be groundbreaking. One of the biggest discoveries in physics to date. But to say that we would have to restart physics is an exaggeration.

In reply to this comment by juliovega914:
I'm pretty sure negative mass would still result in complex energy, because the Lorentz transformation factor would still be proportional to 1/i or -i. Complex mass, however, would allow for the energy to be real (which has been theorized as being possible), but that introduces a whole new problem of trying to conceptualize complex mass.

And on a side note, the first ever physical observation of nonpostive/nonreal mass would be groundbreaking in its own right.

In reply to this comment by Ornthoron:
The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.

>> ^juliovega914:

>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)

>> ^Ornthoron:

The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.
>> ^juliovega914:
>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)



I'm pretty sure negative mass would still result in complex energy, because the Lorentz transformation factor would still be proportional to 1/i or -i. Complex mass, however, would allow for the energy to be real (which has been theorized as being possible), but that introduces a whole new problem of trying to conceptualize complex mass.

And on a side note, the first ever physical observation of nonpostive/nonreal mass would be groundbreaking in its own right.

I'm pretty sure negative mass would still result in complex energy, because the Lorentz transformation factor would still be proportional to 1/i or -i. Complex mass, however, would allow for the energy to be real (which has been theorized as being possible), but that introduces a whole new problem of trying to conceptualize complex mass.

And on a side note, the first ever physical observation of nonpostive/nonreal mass would be groundbreaking in its own right.

In reply to this comment by Ornthoron:
The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.

>> ^juliovega914:

>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)

The thing is, we don't know the mass of the neutrino. If it has a tachyonic nature, i.e. negative mass squared, it could break Lorentz symmetry while still satisfying Einstein's equations.

>> ^juliovega914:

>> ^Jinx:
>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment

No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!
If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?
(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)

>> ^Jinx:

>> ^juliovega914:
If this measurement turns out to be true, we basically have to restart physics.

Again, not necessarily. It would be a ground breaking discovery and would certainly raise a lot of questions...but then I did perhaps one of the most brain melting experiments with results that appear to contradict theory and common sense when I was 14 years old. http://en.wikipedia.org/wiki/Double-slit_experiment


No, it would be a HUGE discovery! One of the biggest ever! and it would completely redefine our modern theory!

If a massive particle moves faster than the speed of light, that means the Lorentz factor for calculating the energy of the particle will be complex! (gamma = c/squrt(c^2-v^2), for v>c, gamma is complex). Do any of you have any fucking idea what that means?

(http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/veltran.html for those of you who dont know wtf I am talking about)

I don't know why this is even an issues.
"god damn those asians and their desire to work hard and get an education!" wtf?

i can say i totally saw some of the "great asian threat" in my career as a radiology tech. the stupid hillbilly white techs got all their panties in a wad about all the asians working in nuclear medicine (which is one of the highest paying modalities in the field) ... like it was some kind of asian conspiracy.. i used to just tell them they weren't allowed to cross train into nuclear medicine because they were too stupid and too lazy and couldn't properly calculate a half life, nor did they understand how it would be possible to image gamma rays. and i was totally right, not one of those fat hens could ever explain to me how to calculate half lives or what a gamma ray was.. but instead of learning and showing their aptitude, they just sat on their fat hill billy asses and bitched that the asians had some kind of club set up to keep whitey from making the big bucks.... fucking stupid whiteys.

>> ^deathcow:

So how does it work?? as metal heats it emits infrared, which we sense as heat. As it keeps getting hotter, the emissions move into the visible light? If you keep heating does it move into still faster light like UV?


Yeah, most materials behave like black bodies and the wavelength of peak radiance increases with temperature ( http://en.wikipedia.org/wiki/Black_body ).

Humans can easily feel the heat from infrared, visible, or ultraviolet radiation of high enough intensity. Actually, I assume we can sense the heat from any type of radiation. Radio (in a microwave), x-ray, or gamma ray. But obviously you don't ever want absorb intense radiation at those wavelengths.