# Blog Archives

## Is speed of light the maximum one can achieve?

By: Nikhil Malankar

What is the first scientific thought in your mind whenever you see a light source or a light beam from any source? Whenever I see a light beam the first thought or question arises in my mind is how can light have such a tremendous speed? The second thought which usually comes in my mind is that if light has such a tremendous speed, then can anyone travel more than the speed of light? The whole article is based on the same concept. I always wanted to clarify this doubt about light. I may go wrong somewhere while writing some concepts. If you find any mistake then do let me know about the same through your comments. Let’s start with the discussion.

We all know that the speed of light is 670616629mph to be precise enough. Take a simple example to understand my concept. The example goes as follows: Suppose you are travelling in a car with a speed of 5m/s. Now you want to travel at 6m/s. So, you pump in more fuel to go a little faster with a speed of 6m/s. But is this possible if you were travelling in a shuttle which is able to travel at the speed of light? Take a simple example again. Example is: Suppose you are travelling in a shuttle which is travelling at 670616628mph. Now you pump in more fuel to travel at 670616629mph which is the speed of light. Now you are travelling at the speed of light. But now is it possible to go further than this speed? Or is the speed of light is just ‘THE’ ultimate speed in the universe? As the speed of light is a ‘physical thing’ we also can’t see of increasing or decreasing it. But is there anything else which can travel with a further speed? If it is then what is it? Let’s go into some further details.

Suppose if we are able to travel at a speed greater than 1mph than that of light. Now the question is that will it affect the shuttle? If the shuttle does not get affected then is there a possibility to go at a further speed? If the shuttle does not get affected then what is the maximum speed one can achieve? If light is the upper limit then why is it so? How does it charge the particles at such a fast rate? And if we are able to travel at a greater speed than that of light than what should we call it? Here I would also like to bring one of the existing concepts of ‘Black-hole’. Black hole is such a powerful thing that it can also attract light which is supposed to have maximum speed. So, if Black-hole can attract at such a great speed then can’t we artificially create such a great speed? If the concept of Black hole actually exists then it is also possible to create such a speed which is also able to attract light. According to the theory of relativity, a Black hole is a region of space from which nothing, even light, can escape.  It is called black because it absorbs the entire light incident on it and it reflects nothing. It is a perfectly black body. The life span of a Black hole is infinitesimal but it keeps on multiplying itself at a very high pace. Black hole is also very small in size. But as it keeps on multiplying itself it turns out into a huge mass which attracts anything and everything. So, can’t we use this concept to create an artificial speed which is actually greater than that of light? It would be an ultra speed to travel. How can we use this in day-to-day life? Let’s see further.

If we are able to get a speed higher than that of light then a whole new dimension would open up. We would be able to discover the universe and those hidden mysteries about so many things. So many unanswered questions would have a justified answer. It would also help for advancements in technology and we can also find out if aliens exist or not. If anyone arrives on any conclusions using this piece of information please do let me know. Thanks for reading this article.

## My views on the Universe : Part 2

By: Nikhil Malankar

This article is the 2nd part of the series ‘My views on the Universe’. The first part was.  My Views on the Universe : Part One. So, I recommend you to first read the 1st part and then come to this 2nd part. Let me introduce you again to this series. This series is my imagination about how the universe actually is. So, without wasting much time let me start off with the topic.

My 2nd part of this series is based on an assumption that the Universe is The Internet! Interesting imagination, isn’t it? Now let’s correlate both of them.

Nobody of us knows that how big the Universe actually is. Whereas we do know how big the Internet is but still we can’t say definitely how big it is. The internet goes on expanding every hour, every minute, every second and every nanosecond because it is being continuously used by people worldwide. Many scientists say that the Universe also goes on expanding continuously. Just imagine that the Universe is The Internet.

Based on these assumptions we can say that the Universe has a definite size at a particular instant of time. But the size goes on increasing every moment. The same is with the Internet. Now here I would like to make a very bold statement. It is said that the Internet’s size doubles every 5.32 years and so the size of the Universe also doubles after a particular time. The time cannot be determined by us because we ourselves are a part of this big, wide network of Internet. Our Internet is comprised of many other things too! You can call them void spaces, trash, asteroids, etc. They are Flash programs. And as we know that the Internet is an open source of information so anyone can edit a part of the Internet. So, the story of our planet Earth is published on some website and accordingly everything is happening. The story is minutely detailed by a very good writer. So, you can imagine that the story of Earth is only a single webpage which has a finite start and a finite end. Every single detail from the formation of Earth to the last second of destruction of Earth is written in a detailed way with stories of our lives, etc. And now just imagine that if the story of our Earth is only a single webpage then what about the other planets, asteroids, black holes, etc.? Now you have to realize that the Universe is really very big and ever expanding and so we can say that if the Universe is The Internet then the information goes on increasing. That is, a new story is published every second! The story of other planets, aliens and every other thing in the Universe is written and published with all the details. If the link to this information is added to our Earth’s website then we come to know about them otherwise the story goes on.

And then as we know that there is no end for the Internet as it is ever-increasing. The information posted on the Internet (i.e. The Universe) cannot be changed! This means that the past cannot be changed. The only thing that can be done is to create a future. And I hope that whoever is the writer of Earth’s story has given it a beautiful future. Whatever has happened let it be. We can only hope for the future to be as good as possible.

So, this is the 2nd part of my imagination. Read more in the 3rd part or just have a look at the 1st part in case you have not read it yet. Click here to read the first part My Views on The Universe : Part One

## The First Electric Current Theory

By: Gaurav Tiwari

//ok….thinking about what i have been since 8th grade….how did the universe all began and how was life created by amino acids molecules….i mean what caused them to combine and form DNA??….recently i got to know that electricity fundamentally consists of flowing of electrons from one point to another(may or may not be a back way)  and was responsible for “destabilizing” the molecules in the oceans filled with dissolved iron to form the perfect life forming recipe… and now starting with the funny language English… he he …lol//

Every once in a while we think about how the universe began and why did it began in the way we see it. One of the mysterious things in physics, which appears almost magical to me, is electricity. This blog is about the formation of the first electric current in nature. I am talking about the lighting we get in the rains. How does that begins? If we find the way or cause of lighting in our time it is certain that all the lightning in the universe began in the same way.

It was the day before the BEEE(Basic Electrical and Electronics Engineering! Phew! The abbreviation is better! 😀 ) exam. I was studying or almost completing my portion for the big test the next day. We had DC circuits and AC circuits as two important chapters in the book and I was passing my time reading the fundamentals of electric current. One thing led to another and I started thinking about the fundamental cause of electric current in any conductor. The answer is simple. Potential Difference. Potential difference causes the randomly moving electrons to flow from point at higher potential to point at lower potential. The current will flow till the PD doesn’t becomes zero. Hence for setting up electric current in any material we need to create a potential difference across it.

How do we create potential difference? By supplying electrons on the negative terminal to make it more negative and taking electrons from the positive terminal to make it more positive. But this also constitutes electric current. Hence the question of how did the first electric current was formed  hit me. The answer was hiding within the skies.

The air molecules in the sky move randomly move about in any free space available to them. In this process they often collide with each other. These collisions provide potential energy to the electrons in the air molecules.

We know that when a body (which is bound to another body due to various natural forces) gains potential energy and moves to a higher orbit. This state is often called the excited state. As a fundamental rule of all bodies that exist in universe the electron will definitely try to lose its potential energy. A ball when thrown upwards falls down because it tries to lose its potential energy. The same happens with the electron in the excited state. It tries to regain its orbit.

But we see that lighting often occurs from one cloud to another cloud and from a cloud to earth. This clearly shows that earth is at lower potential than the electron in excited state. The molecules or atoms on earth are comparatively immobile with respect to the molecules of air in the sky. The reason for that is gravity.

Now there are two ways the excited electron will behave. It will either fall towards the nucleus or move towards the earth.

There is a fundamental rule of the flow of current. It will preferably flow through the path which has low resistance. Hence if the electrons from the excited atoms in the sky are moving towards the earth it is certain that the air resistance suffered by the electrons is less than the resistance in the path which leads to the nucleus.

Now here comes the catch! What could possibly offer a resistance to the electron that is greater than the air resistance it goes through and makes it move the way it moves?

I think there are two possible answers to this.

One is Dynamic Screening Effect. And other is unknown resistance X.

I do not know whether the world knows about dynamic screening effect or something like that is ever used elsewhere. I created that word somehow.

We all know about the screening effect and what it does. Now suppose there is a bucket of water. I take a tumbler and take some water out of it. When the tumbler is removed the water molecules arrange themselves to take the shape of the bucket. Here water tries to regain its original arrangement thus minimizing the effect caused by removal of some of it by the tumbler. Consider another example. Around 7 billion people breathe oxygen every day. Every plant species gives out oxygen and takes in carbon dioxide. Many other processes tend to add and subtract some part of air. But the envelope of air around the earth remains in the shape as before.

Similarly when one electron is taken to a higher orbit other electrons in the electron cloud tend to minimize its effect by rearranging their positions. But the newly formed arrangement provides repulsion to the excited electron which is somewhat like the screening effect. Thus the electron suffers resistance in going back to the nucleus.

Now there are two questions to that thing. How does dynamic screening effect offers resistance more than air resistance? How does it explain lightning in the clouds of hydrogen where there is not enough electrons to build up the dynamic screening resistance?

By logic there has to be some kind of resistance. For hydrogen I can only think of an unknown resistance ‘X’.

## check dimensions

Posted by Gaurav

There is this theorem in the first semester engineering (MU) which gives the formula of centrifugal tension in a belt.

T=m(v^2)

T->the centrifugal tension in the belt

m->mass of the belt

v->the belt velocity

Even if u don’t know anything about this let me tell you that the equation is written as it is given in the various textbooks many of which are recommended by the best colleges of Mumbai.

The problem is with the dimensions. The left side of the equation has the dimension of force whereas the right side has the dimension of energy. We already know that an equation with incorrect dimensions is incorrect. I asked about this to my teachers but I am not satisfied by their answers. Hoping to get the answer from you.