A collections of some quotations and poems of Rumi.
When the world pushes you to your knees, you are in the perfect position to pray ~Rumi
However much we describe and explain love, when we fall in love we are ashamed of our words~Rumi
A life without love is a waste. “Should I look for spiritual love, or material, or physical love?”, don’t ask yourself this question. Discrimination leads to discrimination. Love doesn’t need any name, category or definition. Love is a world itself. Either you are in, at the center…either you are out, yearning.
I smile like a flower not only with my lips but with my whole being. ~Rumi
One day I feel confused and down, the next I can reach the sky without you I am never calm. In your absence people ridicule me, but when you come I don't mind what they think or say. ~Rumi
Time travel...the idea itself is much fascinating when one think of it.With this idea comes various thoughts regarding what we will do after being travelled through time?Most plan(actually dream of) to go to future and see their future life and so that later after returning back to present they can prevent any miss happening yet to occur.
But many think to go back in time,to prevent and rectify whatever wrong has happened with them,may be to save their loved one or to correct grieved mistakes committed by them.
Everyone will have their own plans...but what physics say about,what you can do after travelling through time?
Since nobody has actually traveled through time yet so there are two open possibilities....
Either we will be able to change the past or we won't be able to change the past.
The idea of being able to change the past seems fantastic but by making even minute changes in the past you can drastically change the future not only your...but of whole universe.
If you have watched the movie Men In Black 3 then you will understand what i mean.The movie shows clearly that how an evil alien change the future by killing the agent K in past.
It is due to these paradoxes that the idea of time travel is always been controversial topic among the physicists. Now,the second possibility-which restricts us to make any change in past. A logical question may arise in your mind that how can it be possible that i travel to past and cannot change it by anyway? It can be possible because by travelling to past you will only b full filling the need of the past. Let us consider a hypothetical situation to understand this.. When you were 12 years old you met with an accident,however you survived,having some scratches here and there... because someone saves you but the accident had an psychological effect on you and you clearly don't remember what actually happened that day except this that you went to pick the ball from the road. Later,You grew up to become an eminent scientist and you built a time machine.Now you decide to travel back in time to figure out what actually happened THAT day of accident.You set the date in time machine to the date when that accident occurred.As you reach there(back in time) you find your-young-self playing in the open park near to your house,you remember up to this clearly.You stare yourself for sometime and started to wait for the accident to occur.You wait for considerably long time and started to loose temper then suddenly a ball hits you,you angrily throw the ball aimlessly which landed on the road.Soon you see your young-self going to retrieve the ball in hurry.You notice a truck coming in speed towards the boy(childhood you) which the boy didn't noticed.You abruptly run to save yourself being hit by the truck,just in time you forcefully pulled the boy aside of the truck..resulting in a roll down to the ground.You and your young self got some scratches here and there..and your young self has been fainted during all this. So now you understand what actually happened that day,it was you who threw the ball thus causing the accident but it was also you who saved yourself from the accident and since you didn't observe the truck coming towards you when you went to pick up the ball and also had been fainted during all this that is why you don't remember what happened at that day in your childhood. It can also be realized by again consider the grandfather paradox.In the paradox ,you plan to go back in time and kill your grandfather in past.The act of killing is associated to the past...things which have already happened.That when you in your present is planning to kill grandfather the attempt of killing the grandfather has already happened because it happened in past and since you are alive it means that you have already failed in past. No matter how,maybe you miss the shot or forgot to fill gun's magazine...it can be anyway in which you can fail to kill.Your existence in future showed that your grandfather had survived the past. This is first proposed by David Lewis in essay The Paradoxes Of Time Travel. And i strongly believe in this picture of time travel. However this second possibility also gives rise to a very interesting paradox,this paradox i read in Michio Kaku's book HYPERSPACE,which was originally from Robert Heinlein classic story "All You Zombies" :- A baby girl is mysteriously dropped off at an orphanage in Cleveland in 1945."Jane" grows up lonely and dejected,not knowing who her parents are,until one day in 1963 she is strangely attracted to a drifter.She falls in love with him.But just when things are finally looking up for Jane,a series of disaster strike.First,she becomes pregnant by the drifter,who then disappears.Second,during the complicated delivery,doctors find that Jane has both sets of sex organs,and to save her life,they are forced to surgically convert"her" to a "him".Finally,a mysterious stranger kidnaps her baby from the delivery room. Reeling from these disaster,rejected by society,scorned by fate,"he" becomes a drunkard and drifter.Not only has Jane lost her parents and her lover,but he has lost his child as well.Years later,in 1970,he stumbles into a lonely bar,called Pop's Place,and spills out his pathetic story to an elderly bartender.The sympathetic bartender offers the drifter the chance to avenge the stranger who left her pregnant and abandoned,on the condition that he join"time travelers corps". Both of them enter a time machine ,and the bartender drops off the drifter in 1963.The drifter is strangely attracted to a young orphan woman,who subsequently becomes pregnant. The bartender then goes forward 9 months,kidnaps the baby girl from the hospital and drops off the baby in an orphanage back in 1945.Then the bartender drops off the thoroughly confused drifter in 1985,to enlist in the time travelers corps.The drifter eventually gets his life together ,becomes a respected and elderly member of the time travelers corps,and then disguise himself as a bartender and has his most difficult missions:a date with destiny,meeting a certain drifter at Pop's Place in 1970. Now, the question is-who is Jane's mother,father,grandfather,grandmother,son,daughter?? the girl,the drifter and the bartender are the same persons,if you observed. This is the most mind boggling and cleverly formulated paradox on time travel. However the mystery yet remains the same whether we can change the past or not? and it can only be solved after traveling through time.
The post is about the progress in our understanding of time and the possibilities of time travel in our modern world.The effort is to provide the basic idea without the rigorous mathematics and terms.
So,in previous post we came to know that the space which we see as nothing is actually effected by the presence of mass or energy.Greater mass means greater will be the warping of space and since gravity is nothing but this curvature of space so greater will be the gravity...it is an effect originated from the curved geometry of space.
In short
Heavy mass--->more warping of space--->strong gravity.
It can be easily realized..among planets,Jupiter is the heaviest planet in solar system..so it warps more space than other planets and hence it has the strongest gravity.Similarly Sun is more heavier than Jupiter thus it will warp more space around it therefore strong gravitational pull.
Since both space and time are linked with each other(known as space-time)the distortion in space also results in the distortion of time.Greater the warping of space slower will the passage of time.
Now,
Heavy mass--->more warping of space--->strong gravity--->slower passage of time.
While discussing time dilation of special relativity we understand that the faster we move,slower will be passage of time and also the space will be contracted.These effects(effects discussed in SPECIAL RELATIVITY) are relative i.e you,moving in car,will say people on ground are moving slowly and are contracted(since things are moving for you) while on the other hand for people on ground you are acting slowly and you along with your car have been contracted(as for them you are in motion).
Whereas the effects of general relativity are in agreement from both the observers.
For example,suppose you travel to some other region,which has a much more strong gravity than that of earth.Now,when you again look at the grand clock on earth,you will notice that the grand clock is ticking fast while your wrist watch is ticking at the normal rate.And people on earth,observing your wrist watch will say that your wrist watch have been slowed down and their grand clock is ticking normally.
Here both are saying the same thing but the other way round.
It is because when you moved to the other region with strong gravity(i.e region of more warped space).This curved space also effect your senses and since our senses along with the space have also been distorted that is why we feel everything normal in our local region...and obscure in other,non-local regions.
Such dilation in time due to the curved space is generally called gravitational time dilation.
Einstein's theory of general relativity not only tells us about the curved space-time but it also predicts two highly fascinating objects which should exist according to the theory.
First are Black holes,which have been successfully detected and the other are wormholes. BLACK HOLES are formed after a star dies crushing down completely under its own gravitational pull.They are highly dense..the neutrons and other subatomic particles are almost touching each other having no space between them.
To get an idea of the density of black holes...a ONE SPOON FULL mass of a super massive black hole will be much heavier than the mass of whole landmass of Delhi.
Since Black holes are much more massive and dense... they warp the space around them to a greater extent and hence have a very strong gravitational pull.Even light can not escape the gravitational pull of black holes if it enters the event horizon.
Event horizon is the limit beyond which if anything goes,into the black hole,then it can never came back and will be crushed by black holes immense gravity.
The first image below shows the different stages a dying star passes through to become a black hole
Now since even light can not escape their gravitational pull,they appear black. BLACK HOLES CAN BE USED TO TRAVEL FORWARD IN TIME... If you have understand gravitational time dilation(discussed above) then it will be easy to understand. Suppose you enter a space shuttle and travel close to a Black Hole...since you are now in a region of high gravity then time will pass more slowly for you than the time here on earth.After spending just few hours near to the black when you will return back to the earth then you will find that many years have been passed on earth. That is you traveled to the future spending just few hours near to black hole. However, there are no black holes present near our solar system.The nearest black hole is several light years away from earth..so just to get there requires a lot of fuel first and to spend few hours near it,without being pulled inside will require immensely powerful exhaust system..to overcome their gravity. So going to the future is possible however it may take several years to built such highly efficient ships. Now,what about going to the past?? This is achieved by the wormholes described by general relativity.
Wormholes are just like the tunnels connecting two different places with each other...wormholes also connect different regions of space in our universe.A wormhole simply cut short the distance between two regions of space.Since they are bridges connecting two regions so there can be different kinds of wormholes,some connecting two regions in same universe or some connecting two different universe(if multiverse exist). Wormholes are also supposed to connect different times as well. That is if you enter a wormhole you not only be transferred to an other place but also to either to future or to the past as well.
All this seems exciting right? But sad part is that no macro wormholes(macro here denotes big enough so that spaceships can enter it) have never been detected so far.And if they are detected in future then the physics underlying them states that they will be very unstable.So much sensitive that if anything will cause any disturbance,they will collapse..closing forever. But in June 1988,three physicist Kip Thorne,Michael Morris and Ulvi Yurtsever 'solve' for a womhole (solve because wormholes are predicted mathematically by general relativity,they don't have any physical existence yet but they are supposed to exist),one which is stable and can be used to travel. So it may be possible that one day these wormholes were detected and our technology become so advance that we can construct efficient ships to travel close to a black hole and to pass through wormholes. So whatever you see in science fiction movies are often valid theoretical possibilities off physics which are yet to be verified experimentally. Now it's all folk regarding the time travel..Time travel is not possible with today's technology but may be in a distant future it may becomes the reality. So,if we happened to travel back in time..can we change the past?overturned history completely?rectify our mistakes done in past?....in next post.
The post is about the progress in our understanding of time and the possibilities of time travel in our modern world.The effort is to provide the basic idea without the rigorous mathematics and terms.
Time..for general public it is the normal tick-tick-tick of the clock but for physicist it have been a great mystery from the very beginning of our understanding of nature.
Isaac Newton was the first one who gave a scientific description of time.
Well,this is not actually true,Rig Veda contain very beautiful description of time,however it also describes time as static and moving forward.But there is an another calculation in Indian ancient literature,describing the 1 day of Lord Brahma which shows that people were aware of time dilation...i will explain time dilation later.It all shows that ancient Indians have a deep knowledge than we have today about world,however most scientist don't believe the knowledge Vedas contain.
Newton also described time as something which cannot be changed,it flows like a river.You cannot change it's pace.It is like an arrow always moving forward i.e towards the future.
However,200 years later after Newton,an unknown physicist in 1905 drastically changed the all earlier accepted notions of time.A simple idea overturned the old concepts of time.Albert Einstein...with his Special theory of Relativity shows us that time is not static it changes with our movement in space and is also effected by the curvature of the space itself.Time is dynamic.Time ticks differently for different observers.
Time Dilation...in simple words,it says the faster you move the slower the time will ticks.At first it seems all logical that the faster i move the less time i will take to reach a place.But here what matters is how fast you are moving.
First consider this postulates of Einstein's theory-"Speed of light is constant for every observer"
That is if you are standing on a ground and you measure the speed of light you will measure it to be 671 million miles per hour and even if you measure the speed of light while moving in an air plane with speed 200 miles per hour then you will still measure it to be 671 million miles per hour..it will remain constant no matter you are standing or moving with respect to it.
Now,to understand time dilation,consider this hypothetical situation.Suppose you have a car which can move close to the speed of light and you are about to leave to see an old friend of yours.Before starting your journey you match your wrist watch with a grand clock tower,which is so big that it can be seen from far off places clearly.Now you start your journey..moving at 100 miles per hour things are as usual and normal.You are sitting in your car and the people are passing by you i.e you feel you are at rest and others are moving relative to you.The time(the ticks)of your wrist watch matches exactly well with the grand clock.
However in hurry to reach your friend quickly you accelerate to 400 million miles per hour.You again look at both clocks(your wrist watch and the grand clock) to make sure you are going by time. you will be amazed to see that the grand clock is ticking slower than your wrist watch,soon you will realize that it is not the clock only everything outside your car is slowing down.Peoples are walking slowly,talking slowly,eating slowly as if someone has pressed the slow motion button for outer world.This slowing down of time is known as Time Dilation.You will further realize that everyone outside the car will appear to be shrunken in width(this is known as length contraction),for you things outside car will appear to be exceptionally thin.However you perceive things in your car absolutely normal.
It is just the one side of the story.
For people outside the car you are moving with respect to them.So when they will observe your wristwatch(just assume that you can observe it at this great speed) they will find that your clock is ticking slowly compared to the grand clock and for them,you will appear to be moving slowly in your car.Also they will find that your car as well as you has shrunk in length.You will never feel it physically or mentally because both have also been effected.
The effects are relative..and both(you and people outside) are absolutely correct.It is all because....for you, inside the car,everything else is moving and you are at rest whereas for people outside car you are moving.
Now people may think that what if someone will move faster than light then...one should abandon the idea of going faster than light because relativity shows that faster you move slower the time ticks and heavier you become.That is if you accelerate your car more and more close to the speed of light, the car will become more and more heavier thereby decreasing you velocity.
Please don't think of the news of neutrinos going faster than light...it was found later that there was a flaw in their experiment which result in that result...however it may be possible that we reach that limit some day.
However their are theoretical particles,called tachyons,but they are theoretical there is no physical evidence of them yet.
10 years later Einstein published his General theory of relativity..a theory dealing with gravity.
Newton when discovered gravity doesn't himself know the true origin of gravity i.e what causes gravity.
Although,he was successful in developing the equations to calculate gravity acting between different objects and on different planets..the equation holds at every point in universe,making it an Universal Law.
This new theory,General Relativity tells us what gravity actually is.
Just like the Special theory of relativity,general theory of relativity revealed a more drastic behaviour of space and time,showing a relation between space and time..collectively known as space-time.
Space is the emptiness we see around us(not the space outside the earth) i.e. nothing but mind you this nothing isn't actually nothing it is among the major players who govern the universe.
Space is everywhere,everything exist in this space.Anything which you see as solid is actually 99% empty
(i.e contains space) because an atom which is the fundamental(not most fundamental)constituents of everything is itself 99% empty.Say for example Tajmahal,if you remove all the space from all the atoms making the Taj Mahal then it will shrink down to the size of a grain but weighing millions of ton.
The secret of gravity lies in this space.The presence of mass/energy warps the space-time around it.
To understand what it means see these images..the grids are representing the space.Since we see space as nothing..to illustrate the bending of this 'nothing' grid representation is used.
Yes this so called nothing can actually warp due to the presence of mass/energy and mass drags the space along it.
An another way of understanding,suppose you and your friend are holding a long rectangular rubber sheet stretched.Now i put a heavy metal ball on it.What will happen? The ball will warp the sheet around it,creating a depression around it.
The space behaves similar to that rubber sheet whenever mass(heavenly bodies) is present... they warp the space in the same manner the ball warp the rubber sheet.
Now whenever a heavenly body comes near this depression in the fabric of space..it follows the warp and start revolving around it.Here's pic and a video to illustrate this.
So it is due this warping of space that a planet or any other heavenly body revolves around the other.Therefore,the force of gravity is nothing but the curved (or warped) space.
The physical insight which Newton lacked about gravity is provided by Einstein.
Now,if you still find it hard to believe that how can space be warped or curved.. then let me know you it has been experimentally verified by NASA.
ON 20th April 2004 NASA launched GRAVITY PROBE B to detect whether the warping of space described by general relativity is true or not....and to their satisfaction the probe verified the warping of space...earth is warping the space around it.
Two weeks ago,while reading the newspaper a headline caught my eyes.A baby girl was found in sewers,Ghaziabad.The place wasn't too far from my place where the baby was found,Police suspects that the girl belong to a rich family since the cloth in which she was covered was very expensive.The news drifted my thoughts to a similar incidence happened in my locality last month,i baby girl was found in temple.
It seems that despite Aamir's effort to reduce female foeticide/infanticide,some peoples are still insensitive..such cases are still in news from all around the country.Yes,there is a change,now they don't kill they dump them like garbages...pathetic
Both the two girls were later sent to Mathura,in a child care home.
According to 2011 census and other national statistics 7,00,000 girls are missing at birth after determining their sex.
According to an another report 10 million foetuses have been aborted in India with in past two decades.
The Directorate of Health Services,in Mumbai provides a much more scary statistics that since 2009,around 2.46 lakhs abortions have been done only in Mumbai.In much more detail
from year 2009-2010 about 39,222
year 2010-2011 about 95,332
year 2011-2012(until March) about 1.11 lakh abortion have been done in Mumbai.
The problem,we all know,is thinking.The desire to have a male a child is the only reason.Why a male child?The reasons are as narrow as their minds.The show Satyamev Jayate has already proved the thing that this 'tradition' exist mostly among the respected educated class of the society.
It is a harsh reality that we live among such peoples,in a country where parents can easily kill their innocent new born because it was 'she'.
Human trafficking is an another blotch on our country.Human Trafficking is the transportation of of human against their will,forcefully,to different states and countries for the purpose of exploitation,which includes exploiting the prostitution of others,sexual exploitation,forced labor,slavery or similar practices and the removal of organs.
The purpose of human trafficking is very clear and so are the factors responsible for it.
There are innumerable factors responsible for human trafficking,but among all factors...prime factors are unemployment,hunger and poverty.We have already seen the picture regarding hunger and poverty in our country.The total number of people below the poverty line is 35.46 crore,which unfortunately serves as main targets for human traffickers.Such families are often the targets of smugglers all they have to do is an assurance of good job for their(poor families) sons and daughters,of course which is a trap and as soon as they are handed over to these smugglers,in mere few day these boys and girls were sold to different peoples in different states.
The boys are either sold to work as house hold helpers or to some small scale factories where they work with no wages where as girls are sold to brothels where they were forced into prostitution.
Unemployed people are next main targets of smugglers,the trap is the same,a good job.They were guaranteed with a job.They were told to go to various places,on the name of interviews,in this way they themselves are taken away into the clutches of these traffickers
In 2009,in a conference on human trafficking,Ashwani Kumar,director of CBI during that time,provided the shocking data that more than 1.2 million children in India are caught up in trafficking as child prostitute and added,making the picture worse,that as many as100 million people in India are involved in trafficking related activities. According to a 2006 report of Save The Children India,child sex slaves is increasing because of the male clients,who only prefer 10- to 12- year old girls.
In 2011,862 cases of trafficking were reportedin comparison to 679 in 2010-which is an increase of 27%.
"Out of 325 children rescued by us in 2011,162 were working as domestic helpers;an agent earns between Rs 5000 to Rs 10000 for selling a girl to a brothel,while he can get a commission of at least Rs 20,000 is he sells her to a house hold"-Ravi Kant,the pesident of Shakti Vahini.
Yes,there are laws to prevent it but if these were enough powerful then there won't be so many cases of human trafficking and i might not be writing this post...but the reality is they are not powerful enough to control it.In India,ITPA has made commercial sex illegal but the act failed to address the causes which leads to such victimization.
Various NGOs like Shakti Vahini were doing a great job to curb this social evil.
The sketch i made when i was in 10th standard,thought i should post it.
There are many heroes who fought for the freedom of our country...known and many unknowns,who died for a free and better India.
India got freedom on this very day,in 1947.Since then we are developing,India is often termed as the fastest growing economy.
But it is also a reality that today our beloved country,for which many heroes died,is suffering from various diseases ...diseases like corruption,purchasable justice and innumerable crimes.
In my view development isn't just about the strong economy but also at social and moral level.
About the social development,we all know the reality,we come across it in newspaper everyday.
India became independent 65 years ago but still the country is in the clutches of corruption and many other social evils.Women are not safe in day light and even on busy roads. A rich can easily buy justice where a poor suffers for ages to get justice.
I have the same dream,which those brave freedom fighters have...for which they fought.A country where everyone lives with equality,a country where nobody sleeps empty stomach at night,a country where women can freely survive freely and comfortably,a country where only love and peace prevails...
