Equations of Physics
In our school days or college days we had many problems and most of them were not relationship problems but they were real mathematics and physics problems. Still many of us find difficulty when we are dealing with the equation and formulas. There are tons of equations in physics also; equations are quite normal for you if you’re a physicist, most probably these would have been the reason for many to hate physics in your school days. Literally equation will speak to us if we are ready to hear from that and I know it sounds maniac, you may ask how the equation E=mc2 ; and F=ma is going to speak to us.
Language of Equations
Language can explained as a medium or tool to share our thoughts with others and it make sense if the speaker and observer are familiar with that language. This is what happening when we are dealing with the equation, we can’t understand what they speak to us because we don’t understand it. There is a famous quote saying “Mathematics is the language of Physics” and most of the theory is initially proven by equation, not by experiment. Still we are sticking with equation from launching our rocket into space and landing our probe on the surface of moon, from the working of computer to the working of mobile phone and so many are there..! I hope now you understand the importance of equations.
‘E=mc2 ’ is not the only famous equation but I noticed people using this equation often in many place like in a physics seminar, science exhibition, note-books and so on. At first I too didn’t understand this equation and later it was surprising me because the way Einstein derived this equation was impressive. This equation was the product of the Einstein’s theory of relativity; This equation of Einstein didn’t bought him Noble prize but photoelectric Theory. This equation is very popular in physics which doesn’t mean this is the greatest equation in physics. There are many equation like this which are even more greater in their way. For an example Schrodinger equation, which are super hard to understand itself but its role is a must in quantum physics.
This “m=E/c^2 ” is the format of equation in the Einstein’s paper, later it is converted into “ ”. Let us get some glimpse about the world famous “E=mc2” equation. The reason behind the birth of this equation is law of conservation of energy and it was explained in our previous article – “Ocean of Light”, do check to get some idea about that law. So according to that law the energy is conserved; Energy is nothing but capacity to do a work. In this equation we can notice “E” is referred as Energy, “m” is referred as mass and “c” referred as velocity of light in air medium. In olden days people thought that energy is different from mass, in simple words they thought energy of an object does not depend on the weight of the particle.
This thought was broken by the Great equation of Einstein, this equation relates the energy of a particle with its mass of the particle.
Let us imagine you are going to a meat shop and you see a live ‘1 kg chicken’ there which seems enough for your family. The vendor weighs that chicken and gives it to the butcher to clean and cut it into small pieces. After all process the package reaches your hand and again you weighed the package, you can notice the 1 kg chicken is reduced to around 800 grams. Where the remain weight of the chicken is gone? Obviously you can’t argue with vendor for stealing your meat instead the loss of weight is due to the feathers and wastes of chicken. So the total weight of the package you got and the weight of the wastes cleaned by the butcher must be equal to 1 kg (Weight of live chicken).
Now let us see the same thing in a very small scale. Let us take a Hydrogen atom which is made up of two Sub-atomic particles namely Proton and Electron. Let us take mass of a proton as ‘A’ and mass of an electron as ‘B’, so the mass of a whole hydrogen atom must be ‘A+B’. But it is not correct in this case because there is a loss of mass like we saw in the case of chicken.
Where do the lost mass went?
Who took that mass?
The answer for these question is given only by Einstein’s equation, the lost mass is converted into energy and that is the energy which is used to bind atom together, that energy is known as Binding Energy. This was the mind blowing solution for this problem.
What do we get?
This equation laid foundation for may useful things in the modern world and hence marks the birth of Nuclear Fusion. The Nuclear Fusion was very important in those days in order to produce energy for the Industrial revolution and Nuclear weapon for the World War. Even though Einstein is considered as a great mind in physics, it was his letter to the President of America which insisted them to built a Nuclear Weapon, which America dropped on Japan during the World war. This horrifying incident made the world to understand the enormous energy of the Nuclear Weapon and also made Einstein to regret for his letter. If you want to know more about nuclear physics, leave in the comment.
Even light is a form of energy and some amount of mass is transferred into light. For example when we turn on a flash light the mass inside the battery is converted into light energy and you may find a reduction in the mass of the flash light, but it is too small to identify the reduced mass in our world. Another great example is not only sun but all stars loss some of their mass and convert them into light energy. Don’t worry that the Sun will die because we still have 5 Million years ahead.
This Equation of Einstein relates the mass and energy under a constant of speed of light. There are contribution of many scientist to built this equation but those clues only helped Einstein to give birth to this equation. We should remember when Einstein published this paper he was a young man. To understand how the equation is constructed we need to get some knowledge in the theory of relativity. This is most famous equation of Einstein and Einstein worked a lot on this equation but it didn’t bring him Noble prize and made him famous. There are some gossips that during his time many didn’t understood the theory of relativity but the sad reality is that many times Legendary things do not get proper recognition.