musings n thoughts
Wednesday, December 16, 2015
Sunday, February 02, 2014
Why massive particles may travel faster than light.
There is a lot of hue and cry these days at an experiment
that has detected a neutrino travelling faster than light. Many physicists are
skeptical and are asking for extraordinary evidence as they feel this is an
extraordinary result. Many are calling for more accurate measurements of time,
distance and masses involved. I believe this may not be an extraordinary
circumstance as in my humble interpretation of special relativity it only
prohibits massive bodies from traversing the light speed barrier
and do not say anything about particles born travelling at speeds greater than
the speed of light. My interpretation is
as follows:
Special relativity holds that when massive bodies travel at
speed
, their length in the direction of motion contarcts
by a factor of (sq root of (1 - v squared / c squared)) . Similarly
their mass increases by the same factor, and finally their clock slows down by
the same factor.
The above three effects can be readily
understood if we consider a 2 – dimensional world (for the sake of this
discussion) and add time as a third dimension to this world. We need to make
just one conjecture to explain the above three effects in this 2+1 space time
continuum. The conjecture is that as a body travels in space with a velocity v , it tilts up in the time dimension. The
angle of inclination depends upon the velocity. I will illustrate this
conjecture with a diagram:
Figure 1 A cross section of 2+1 space time
Let us suppose that a rocket R1R2 is
travelling at velocity v toward right. According to the conjecture only its
‘shadow’ R1R3 is visible to the inhabitants of the 2D
space. Obviously length L of the rocket
visible to the inhabitants is smaller than its rest length Lo. Now
special relativity tells us that L = Lo(sq root of (1 - v squared / c squared)).
From Eq.2 when v = 0, K = 0 and when v =
c, K = Lo. That is when the rocket is at rest, there is no tilt and
hence no length contraction. As the speed of the rocket increase the tilt
increases, therefore the length visible to 2D people shrinks. Now, when the
rocket is tilted, another effect comes into being. As the Force applied to the
rocket to accelerate it in the right direction (in space) is actually being
applied at an angle to the space dimension it produces less acceleration in x
direction as compared to the expected value (From F = ma law).
From Eq.2 force
available for acceleration in space dimension is reduced by a factor (sq root of (1 - v squared / c squared)), the 2D people interpret it by saying
the mass of the rocket has increased by the same factor. Now as v approaches c,
the inclination angle gets steeper and steeper and the force component
available in space becomes smaller and smaller. Eventually at v = c the rocket
is completely vertical and travelling only in the time dimension, and to space
people it seems that no matter how much force they apply to the rocket it wont
budge an inch, and they therefore conclude that its mass has become infinite
and its length has become zero.
Finally we can explain the time dilation
by considering the following fact. If a boat is traveling at a speed v, which
is the same as the speed of the water in the river, but in the opposite
direction, to an observer standing on the bank of the river the boat looks
still.
Figure 2 standing boat
Now when the rocket is vertical it is
moving in the time dimension with the speed at which time seems to be moving to
the inhabitant of 2D space but in the opposite direction, consequently giving
the impression to the observers that the rocket time is stationary.
However, if a body travels at a speed
faster than the speed of “time river”, its length may become negative and its time will start flowing in
the reverse direction, and in presence of these two effects its mass will
become meaningless. (in other words, instead of offering resistance to the force, the rocket will start attracting the force, whatever that might mean) (Assuming that the
angle will keep on increasing).
On the other hand, the angle of 90 degree
may be some kind of a limit, after which the movement of the body would remain
vertical, but only increase in speed. In this case, a massive body born
travelling at a speed greater than the speed of light will remain undetectable
to 2D space people. However, if, in rare cases, they are somehow able to detect
the birth and demise of such particles, they may indirectly conclude that it
must have traveled at speeds faster than that of light.
Tuesday, October 15, 2013
Levels of reality
These are actually levels of order within matter. At the fundamental level we have fundamental particles. These particles have their own properties, tendencies and laws of behavior. Using these laws and tendencies they form structures like nucleus and atoms and their movements are also determined by non-deterministic laws expressed in probabilities. At this level we have physics that describes the reality. When these atoms combine to form molecules they also acquire new behavior and these new rules can not be derived from the rules used to describe the atoms and sub atomic particles. Since molecules have structures that have their own reality, which determines how they combine and react, they require their own rules and laws - applicable to these structures. Since these structures do not exist at atomic level, molecular laws can not be applied to atoms. Thus chemistry is the science that describes this second level of reality, so as to speak.
Saturday, August 17, 2013
God
This is just a brief note. I realize that writing a brief note on God would beg the question why or what for, but anyway, maybe in the future i will expand.
So the gist of most of the arguments that claim that science has demolished God's delusion is that all the reasons or attribute people have attributed to God, can now be fully explained by science, with absolutely no need to invent a God to explain those things. Well, let me point out the limitations of this argument. Number one, their thrust is against people who claim in the existence of God and not on God itself. Secondly they rely on the concept of proof and logic. Third their proof is faulty.
So, am I saying that I can prove that God exists? No. Let me explain. First, I do not disagree with those who find flaws with arguments that seek to attribute causes of various natural phenomenon to God. I believe all natural phenomenon have natural causes or explanations, that is it is always or should be always possible to say X is or X happens because Y is or Y happens or something like that. In other words, most of the world works in a "clockwork" fashion, albeit without the connotations of determinism. The universe is a non-deterministic clock work - the future has a definite link with the past, provided you do not think of definite as one to one. In this respect it is right to say that science can or will be explain everything eventually. My question is " is explanation sufficient" in other words, are how questions the only legitimate ones. Maybe not. Maybe why questions are also equally important.
Secondly, it is quite evident by now that logic has its limits, maybe even severe limits, when it comes to accessing truth or achieving truth. There will always be truths that lie beyond logic. Logic is a framework that guarantees correct results within the framework. However, the size, scope and complexity of this framework is finite and limited.
Thirdly, how by showing the non necessity of an entity in a certain process establish non existence of that entity?
to be continued...
So the gist of most of the arguments that claim that science has demolished God's delusion is that all the reasons or attribute people have attributed to God, can now be fully explained by science, with absolutely no need to invent a God to explain those things. Well, let me point out the limitations of this argument. Number one, their thrust is against people who claim in the existence of God and not on God itself. Secondly they rely on the concept of proof and logic. Third their proof is faulty.
So, am I saying that I can prove that God exists? No. Let me explain. First, I do not disagree with those who find flaws with arguments that seek to attribute causes of various natural phenomenon to God. I believe all natural phenomenon have natural causes or explanations, that is it is always or should be always possible to say X is or X happens because Y is or Y happens or something like that. In other words, most of the world works in a "clockwork" fashion, albeit without the connotations of determinism. The universe is a non-deterministic clock work - the future has a definite link with the past, provided you do not think of definite as one to one. In this respect it is right to say that science can or will be explain everything eventually. My question is " is explanation sufficient" in other words, are how questions the only legitimate ones. Maybe not. Maybe why questions are also equally important.
Secondly, it is quite evident by now that logic has its limits, maybe even severe limits, when it comes to accessing truth or achieving truth. There will always be truths that lie beyond logic. Logic is a framework that guarantees correct results within the framework. However, the size, scope and complexity of this framework is finite and limited.
Thirdly, how by showing the non necessity of an entity in a certain process establish non existence of that entity?
to be continued...
Monday, January 09, 2012
Kant
Do I dare write about Kant? So far I haven't. But now I feel,if I don't write I'll never be able to "wrap my head around him". Funny phrase - gives me a headache already. Anyway, when I read that Kant wanted to reconcile or reproach the gap or divide between rationalism and empiricism, but he couldn't quite succeed - I ask why? Is this not sort of obvious. Lets take an analogy - a modern day computer (unfortunately not yet invented in Kant's time). Lets equip this modern day computer with a lot of sensors so that it could accumulate a lot of sensory data. The sensors are capable of sensing and storing this data we assume. Also provide this computer with a state of the art processing core. Now turn this computer on. It starts collecting lots of empirical data - images, video, sounds, temperature, texture, scents, and perhaps even pain and happiness. If this computer is to ever start talking it needs to have some pre- installed instructions of how to respond and 'make sense of'' this rapidly accumulating data. So there needs to be some before hand warnings of what to expect and some pre existing receptacles for this incoming data. How else can this data be ever useful? However, it is also obvious that not all empirical data can even in principle be fed before hand into this computer as most of this data gets generated in real time as a result of interactions of all moving things. This is what I feel Kant wanted to say. To see if I am wrong I have to read him again. So lets do it.