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Sunday, April 24, 2011

Why is there something rather than nothing?????????

the most perplexing question of not only physics but the entire science is:
 WHY IS THERE SOMETHING RATHER THAN NOTHING???????????

well i dont have the answer but i can assure you tht u still havent got the feel of the question........................

recently NASA released photos taken by the hubble telescope and made them public............looking at these photos one realizes how vast the universe is.............
almost 90% of the entire universe is empty........sheer nothingness..................
about the rest 10% can be categorized as matter...............
matter is made up by atoms which are further made up by eletrons and protons................

now 99.99% of the atom is empty........again sheer nothingness..............and according to quantum mechanics the electron's position and velecity cannot be determined accurately, so we speak of the probability of finding the electron in a certain position...............now quantum mechanics also says that the electron exists only if it is obeserved............the observers being us(assuming no other life in this universe)
the observers hardly form 1 by 1 trillionth part of this universe(i trillion is an approximation made by me, actually it is far more)....................

now 90% of the universe is empty....out the remaining 10%, 99.99% is also empty and the rest remaining 0.001% exists only because we observe it(and the observers being a negligible part of this universe)...............

so is there something or nothing at all is the question to ask.....................

Wednesday, April 13, 2011

Physics Facts

Here r some facts abt physics u shd know if u r studyin the subject:

1. We all knw tht the universe began with no net charge, i.e. charge ws conserved ....................
     but wat ws the ratio of electrons to that of protons in the beginning?????????
     1:1 u say............wrong!!!!!!!!
there were 1 proton for every 10000 electrons.........even more so...........
at the beginning there were majorly electrons and positrons and photons and neutrinos................
it ws after a long time of 700 million years that the first atom came into being after the big bang


2.Why r the equations given by einstein to explain the transformation of frames known as lorentz tranformations????????
actually these eqns were discovered by lorentz long time before Einstein even thought of no ether medium..........
however these eqns were given to explain some phenomenons exhibited by electrons and protons..................but somehow lorentz gave a very complicated explanation regarding the derivation of these eqns(Currently known as S.T.R) and wasnt accepted............it ws poincare who named these eqns given by einstein as lorentz eqns to honor the scientist............


3.Quantum mechanics is the second most experimentally verified theory after relativity................but there is no way to obtain the newtonian picture frm it as we do frm relativity wen we put v<<c.............its as if there is no transformation btw quantum mechanics and newtonian mechanics............
Do njot froget that even the largest of our stars r still made up of tiny particle that r governed by quantum mech. whereas the star is governed by newtonian mechanics..............


4.The basic fundamental pillars of physics r missing....................as of now basic fundas lack a clear definition..............try for urself.......answer these questions
              1.what is mass???
              2.what is charge????
              3.what is a wave????
              4.what is energy?????
if u hv an answer then plz let me knw..........................


5.Michelson ws the 1st american to get the nobel prize for physics................he go that for his famous experiment named after him..............michelson morley experiment............an experiment tht ws intitially carried out to detect the presence of ether............
FACT: he got the prize 2 years after einstein gave his special theory of relativity................


6.Gravity as such doesnt have an equillibria in the universe............there is no force opposing it.............yet the universe expands!!!!!!!!!!


7.the spiral arms of spiral galaxies lack an explanation...............


8.if there is any possibility of ever meeting with aliens the most advanced civilization tht we will ever encounter would be tht of a bacteria.................


9.which terrestial object in our solar system has a bigger possibilty of supporting life???????
mars?????WRONG.............................
the answer is a small moon of jupiter Europa which is covered in ice............scientists think that there may exist water at a depth of 32 kms from the surface..................first life on earth emerged in the water............however such a life on europa would not be able to contact us because of the 32 km ice sheet above them......................


look out for more................!!!!!!!!!!!!!!!!!

Thursday, March 24, 2011

Quantum non-locality:Defiance to Special theory of relativity?????

In a seminar Being attended by two most renowned physiscts ever Niels Bohr and Einstein the former asked the latter a question which was to become a sensation throughout physics......................................
the question was simple but has eluded an answer by evn Einstein himself...................
here goes......................

"consider a thought experiment in which there is a machine that can give two electrons opposite spin thereby making the total spin zero......although the electron will not show only one spin throughout its lifetime the electron will adjust its spin as such that the total spin is zero......................now wen the total spin has been made to zero take one electron far away frm the other one................now wen we measure the spin of one electron the spin of the other is automatically found out to be just opposite bcoz the total spin has to be zero..........................this result has been proven experimentally...............


Now the question is:
                    "if nothing can travel faster than the speed of light then how did the other electron know wat spin to take almost(well exactly) instantaneously????????????

lets c if an answer cms up.....................

Tuesday, March 22, 2011

Superstring Theory: The theory of everything??????

When Einstein gave his famous General theory of relativity he was dreaming of a unified physics...............
A single Equation to describe the four fundamental forces of nature: Weak forces, Strong nuclear force, E.M, and gravitational....................
However gravitational force has resisted all attempts on the same................
After giving his famous theory Einstein began to work the Grand unified theory that could explain all phenomenon on the basis of Geometry: a tool which he had employed for the general theory of relativity.................
he had employed a metric tensor given by Reimann for a n- dimensional space......a very powerful tool....
all einstein had to do was extend the metric tensor for 4 dimensional space...........
not very long after he recieved a paper from a physicst kaluza that if we extended the reimann geometry to a 5 dimensionla space we get a tensor that unifies E.M and gravitational field very beautifully.................
althugh at tht time there was no need to believe tht space could have more than 4 dimensions so the theory remained dormant for a century known as kaluza klein theory................
Quantum mechanics took over the work of einstein but still gravitational resisted persistently...........
E.M., weak nuclear forces, strong nuclear forces were unified under a model known as the standard model...............
soon it became evident taht gravitational force could not be united coz it yielded non sensical answers..........
but interest rose again in the kaluza klein theory( it still had some unexplained phenomeon and needed corrections drastically)............
The kaluza klein theory had nothing to do with strings.................but in the 20th century an unexpected thing happened..........some scientists derived entire formulations of gravitation based on the basic properties of strings..............
apllying kaluza klein theory to the strings yeilded us the first form of superstring theory called as string theory which claims to have united the four forces of nature.......................
after much more refinement the theory ws rechristened as superstring theory.........................................

bcoz the theory was a result of an accident in the 20th century the exact mathematics required to solve the theory completely has not been formulated as yet...........yet some results r evident in the form tht the strings require at least 10 dimensions for self sustained vibrations...............
haower the energy required to prove this theory is correct or not is about the order of planck's energy which is exceptionally high considering the fact that even our biggest atom smashers run at lower than half the plancks energy.................................
so superstring theory has unified the forces under one single banner and tht too very beautifully but we still lack an experimental proof to it..................

Unreal but fascinating...............


Free will is no longer free

We all know wat free will is.............its something that gives us the power to choose over circumstances............rather its something that makes us so different than the stars frm which we r born......

but.........is free will real????? or just a figment of our imagination; a projection of a bigger power at work...........

i as physics student do not believe in things which cannot be proved....but yes i can prove free will doesnt exist using physics again........
so here goes.............

consider an atom in free space with nothing around it......as can be proven the atom is neutral and under no influence frm anything as thre is nothing around(even the vacuum is full of particles, but lets assume here it isnt).  let us place another another atom in its vicinity........the first atom is sudenly influenced by garvity and other forces...........we can easily calculate the influence.........
now consider not an empty space but a region full of atoms...........can we calculate their influences, locations and velocity????????
the latter two are impossible to calculate due to a ban put on by the most experimentally proved Heisenbergs principle of uncertainity............however the ban is on us.....not on the particles themselves, they will have a velocity and a location at some time but we wouldn't be able to calculate it.........no wonder even the greatest computer can hardly calculate a three body problem..............
as for the influences they r clculable...........

so the gist is: each particle follows a certain set of laws and goes according to them never showing a deviation...............so can be said abt a region full of atoms............
now consider tht region full of atoms as a human...................
so my friends r we any different????????????
the same laws apply for us........however incalculable due to zillions of parameters involved!!!!!!!
free will doesn't fit int this picture at all..........     

The girl with no past

We all know that special theory of relativity imposes a ban on time travel............
but Einstein's second theory: General theory of relativity predicts or rather incorporates time travel as a basic fundamental of the theory........................
well here goes one simple story of a girl so maddeningly lost in time its gonna set your mind racing.............


There was a orphan girl by the name of Jane. At a very young age she was abandoned at the orphanage by some mysterious person. wen she ws 18 she left the orphanage to fall in love with a drunken mechanic. soon she got pregnant and the mechanic disappeared nowhere to be found. at the time of her delivery there were complications and the doctors found out that she had both sets of sex genes and decided to convert her into a he. soon after delivery Jane's(who's now a he) child gets kidnapped by a mysterious person. dejected by life he becomes a drunkard and starts working as a mechanic like her(his) ex lover. one day he finds himself at a bar telling his story to a bartendr who offers help by gifting him a time machine on one condtion tht he become a part of an organization tht calls themselves time corps.
so having got the machine Jane goes back into the past to find the unfaithful lover..........in a series of events Jane falls for a orphan girl who eventually gets pregnant. but due to some technical problems in his time machine he is forced to return to the present where he finds that the bartender has disappeared. as promised he joins time corps and is given the first mission to go into the past to steal a child frm the hospital and to put the child into more past in an orphanage..................after having done that he rises prominently in the corps when finally he is given the mission of meeting a drunk mechanic at a bar posing as a bartender.!!!!!!!!!!!!!!!


So the final question is: who is Jane's mother, father, daughter, grandfather, grandmother, and so on or who is Jane???????

it seems out that the answer to all the questions is Jane...........

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