My Speech

Hai frnds,

Every year we conduct an exanimation on first week of September to test the technical ability of the students within our ECE department in our college and give an award called ECE Eminence Award for the one who comes first in the exam on 15^th September. As yesterday was holiday, the function was held today. This year I got the Eminence award. For that I was asked to share my happiness, my efforts to achieve the award. I have given a brief speech. Now I would like to share it with you (kindly tolerate and comment). Here we go:

                “Good morning one and all. First of all I would like to thank my staff members who made me to think beyond the book. Scientists, researchers are all keep on searching to find answer to the question ‘what is the purpose of life?’ and came up with different answers. One of the most satisfactory answers among them is to keep on learning. Yes most of them agree that the purpose of life is to keep on learning (if you think this is not the purpose, plz tolerate) We can learn from everywhere – in class, office, hotel, park, beach and well in theatre too, anytime - from dawn to dusk, from the moment you get up from the bed to the moment you wind up your day. But for now I start with the ultimate master which demands all of our attention to learn things from it – The Universe. Yes, The universe is the greatest teacher. It keeps on teaching us every second.  We can learn many things from the universe. I hereby state a few...

1.       Perfection kills: If you want to develop yourself, never try to be perfect. When the baby universe was born, the hydrogen atoms spread all over the empty space unevenly. So they are brought together and form into the present Universe. If the atoms were spread evenly and forms symmetry, equilibrium occurs and the universe may stopped its growth the moment it born. So never wait to start a work until you think you are perfect in it and master it. Start your work and march towards the goal, you will master it one day.

2.       Establish the basic laws: The universe is truly a grant scale structure, unique in its fabrication. But how big it may be, every actions of the universe, from the teapot I’m holding right now to the thunder that is happening in a distant pulsar can be explained with the help of Newton’s laws. Yes of course the grant universe is built with these simple basic laws. So have simple laws and built yourself around it.

There are millions of things we can learn from the universe. The only requirement is that we have to open our eyes to learn to unfold the secrets and of course to learn from the unfolded secrets.

Next we learn from our parents (learnt might be more perfect). In an artificial intelligence, if we design a neural networks, it would take 2, 00,000 codes for the AI to select the good tomatoes leaving behind the rotten one. But we are selecting good tomatoes, arguing with the shopkeeper to reduce its price, walk, dance, sing, writing this blog etc….. Just think a moment how many codes might be written in our genes. Trillions and trillions... Obviously the credits go to our parents. So parents are our next teachers.

Even though the universe keeps teaching us every second, we have in built memory with abundant codes; we need someone, some real heroes to open our eyes to make us learn all these. They hold the key to the door which unlocks the mysteries of nature and making us fit to learn from the universe. They guide us every second; make us to think beyond our books. Guess who?. Yes of course, our teachers!!! Without them we could not learn and admire at the wonders around us. I use this wonderful opportunity to show my token of gratitude and thank all of my staff members on behalf of you all. Thank you teachers for being with us and guiding us round the clock. Thank you.”

 

P.S:  Kindly post your comments.

 Baluu

Quantum World-2

Hai friends,

       Welcome to Quantum World-2. Thank you for your kind support (but still no comments??). Kindly post your comments. Ok. Let’s dive in… We have posed a question that if Planck length is the smallest predicted distance what might be the fabric material of the Universe. Scientists assumed a particle called quantum foam also called as the space time foam whose dimension is of the order of Planck length which is assumed to be the building block of the Universe. How the universe would be born is the question man has been asking since he started admiring at the nature. While the big bang explains how the universe has expanded and cooled, the nature still holds the key what triggers the process. How it is all empty a minute ago is filled with the baby universe the next minute? We need virtual particles to come into play to predict the past, indeed paaaaaaasst, first what are these virtual particles? Consider an electron hitting another electron and scatter, a photon is emitted during this process. On calculating, we will find that the photon has mass! Since the photons are massless particles, it seems to invalidate the whole data. But it doesn’t. We need another quantum axiom to continue the journey.  Heisenberg’s Uncertainty principle! This principle states a loop hole in the energy-momentum conservation. It pointed out that the energy and momentum need not be conserved provided that this unbalanced stat doesn’t exist for long. Consider a simple example to make things simpler. You give Rs.2000 to your friend and told him to give it back to you a week later. In simple terms, he will keep the amount for a week and give it back to you. Seems easy right? But it doesn’t., within the week he is free to lend the money to anyone and temporarily have wrong amount and later get it back. The larger the amount he lends, the quicker he will get back the money. Similarly in quantum realm, the energy and momentum can be momentarily wrong, but larger the discrepancy, the shorter the time for which it is allowed. So in our example of electrons scattered by exchanging photons, the photon can briefly have the “wrong” amount of energy and momentum.

     The life of an electron is much more complex than what we thought. In addition to the usual quantum craziness, where an electron is both a particle and a wave and the position of the electron is generally indeterminate, electrons are surrounded by virtual particles. For instance, an electron can briefly emit a photon. That photon will be reabsorbed quickly in such a way that the energy and momentum conservation laws aren’t violated. But it gets crazier than that. The virtual photon can also turn into a virtual electron/positron pair. Thus, for a brief moment, what was once just an electron becomes an electron plus an additional electron and positron. As long as the virtual particles coalesce before the universe notices, it’s all within the rules. Indeed an electron never exists as a single “bare” electron. Rather, it is always enshrouded in an ephemeral cloud of virtual particles, flickering in and out of existence, and vastly complicating what an electron “really”is. The space that we thought to contain nothing- no matter, no energy, no charge, nothing -is actually filled with writhing, active population of virtual particles that physicists call "the quantum foam", with bubbles appearing and popping in wild abandon. At this sub atomic level, the space is never truly empty. So in short, Perfection simply doesn't exist.. Without imperfection neither you nor I would exist. The quantum foam, virtual particles are really the craziest phenomena in quantum mechanics. What is non-sense in classsical physics forms the basement of the quantum physics. Yet it builds the Universe, the Sun, rthe Planets, yes inded our home Earth which exactly follow classical physics. The nature mother is kind enough to provide us the home, food,  perfect place to live in, to admire at her beauty, her mystery but never let us to enter into her kitchen to know the secrets.

Kindly post your valuable comments.

Baluu

Quantum World

Hai friends: 

Welcome to the Quantum World where physics has its own laws which deviates from the one we studied in our higher secondary text books. Before going deep into the quantum world, let us define its threshold point. To start with let's see the difference between the continuous and discrete signal. A Discrete signal is defined at particular instances of time whereas a continuous signal on the other hand is defined at all instances of time. But is it so? Is it possible to define them for a period less than 10^-43 seconds or 10^-35 metres of length. The answer is definite NO. Things act weird and wild in the quantum world. This distance, 1.616199 × 10⁻³⁵  m in precise, is called Planck’s length. It is defined by Max Planck which can be defined from three fundamental constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant. The Planck length is about 10⁻²⁰ times the diameter of a proton, and thus is exceedingly small, it is considered the smallest length known/possible.  

There is currently no directly proven physical significance of the Planck length; it is, however, a topic of research. Because the Planck length is so many orders of magnitude smaller than any current instrument could possibly measure, there is currently no way of probing this length scale directly. Research on the Planck length is therefore mostly theoretical. According to the generalized uncertainty principle, the Planck length is in principle, within a factor of order unity, the shortest measurable length – and no improvements in measurement instruments could change that.

The Planck length is the square root of the Planck area, which is the area by which a spherical black hole increases when the black hole swallows one bit of information. The Planck length is the length scale at which the structure of space time becomes dominated by quantum effects, and it would become impossible to determine the difference between two locations less than one Planck length apart. The size of the Planck length can be visualized as follows. If a particle or dot about 0.1mm in size (which is at or near the smallest the unaided human eye can see) were magnified in size to be as large as the observable universe, then inside that universe-sized "dot", the Planck length would be roughly the size of an actual 0.1mm dot, that is, about the size of smallest object the naked human eye can see. In other words, the diameter of the observable universe is to within less than an order of magnitude, larger than a 0.1 millimeter object, roughly at or near the limits of the unaided human eye, by about the same factor (10^31) as that 0.1mm object or dot is larger than the Planck length. More simply - on a logarithmic scale, a dot is halfway between the Planck length and the size of the universe. If we could travel deeper beyond this halfway we halt at the Planck's length. Planck's length is where all actions stop. No Physics, No actions, Nothing..

Physics is not yet determined nor predicted beyond this length. The Nature is yet to unfold its secrets beyond this scale.

If Planck’s length is the smallest known what would be the building block of the universe then????. Wait until my next post.

P.S: requesting your valuable comments…..

Baluu