BY: Arjit Mishra
For understanding this UNIVERSE in a better way we have divided Physics into three parts- Classical Physics, Modern Physics and Quantum Physics.
In Classical Physics this UNIVERSE can be described with simplicity because If we study the past behaviour of an object then we can easily tell it's future behaviour. Moreover by it's present behaviour we can easily tell what would have happened to it in the past. for example- If we know the speed with which Earth is revolving around the Sun then we can easily tell, In which month Earth was/will be present at which position. In fact we can tell 2 yrs. ago It was present at which position.
But If talk about Quantum Physics, It completely changes our perspective to observe this UNIVERSE. In this we try to understand the behaviour of sub-atomic particles like- electrons, protons, photons,etc. Here we can't Predict the results of experiment before; If we repeatedly conduct the experiment, then too! . We know that Quantum Particles can be present at multiple Locations at a same time and can behave differently at a same time whiz believed to be Impossible in Normal world. we can't even Logically expect ourselves to be present and behave differently at different Locations.
That's why the Laws of Classical Physics are not applicable in Quantum Physics and the world described according to Quantum Physics can't be seen in Reality. Quantum Physics is considered as weird but Scientists believe that actual word can only be studied through Quantum Physics.
Today's Blog is about a Thought Experiment through which a Physicist known as Schrödinger described that, with Reference to bigger objects the Principles of Quantum Physics are weird and Pointless, this Experiment is Popularly known as Schrödinger Cat Experiment.
Many Experiments of Quantum Physics have proved that till when we don't observe the Quantum Particles, They exists in all the possible states of themselves at the same time which is known as Superposition state and as we observe them through any of the suitable instruments, their wave function collapses and a single possible state is selected from the treasure which becomes our Reality.
Our instruments can only see the state which is called "Result". Which means we can't tell the Result of the experiment without actually conducting it because we can get any of the possibilities as Result.
If it is true then it should be applicable on humans, animals, and everything that we can easily observe because they are also made up of Quantum Particles but we know that this is not true and every easily observable things are observed in a single state only! not more than one. for example- A car, either can be in rest or can be in motion at a time not can be in both rest and motion at a same time.
Schrödinger was not able to swallow this theory beyond his throat, which is also known as "The Copenhagen Interpretation". to showed Quantum Theory is Rubbish with Reference to Bigger Objects He take a count on a Thought experiment which is famous in the name of Schrödinger Cat Experiment.
In this experiment He trapped an Alive cat inside a Box, Along with the cat He also put a radioactive substance, a poisonous gas bottle, a hammer and a radioactive sensor in the box.
The radioactive substance was such that it's probability to decay was 50% and a hammer was attached to the radioactive sensor through a string and the poisonous gas bottle was put on the surface of box such that the heavier part of hammer was present just above to.
As the decaying of radioactive substance starts, sensor detect it and after that the hammer fall on the poisonous gas bottle resulting in death of the cat.
Till when the box is closed we don't know what is happening to the cat inside the box, is it Alive or Dead. And as we open the box, then only we can tell that the cat survived or not.
If we imagine cat as a Quantum Particle and apply the superposition principle then we can say that when box was closed and no one was observing the cat, then cat in the box exists in both of it's possible states. yes! there can be only two possible states only, either it is alive or dead which means at the same time the cat was alive and dead inside the box. when we open the box it's wave function collapses and one state is selected from two of it's possibilities and that state becomes our Reality.
That's the reason if we conduct this experiment repeatedly then every time we would get different outcomes or more specifically sometimes cat would be found Dead and sometimes it would be found Alive.
Our common sense says that when box was closed, at that time only either cat survived or lie dead.
If the cat was dead then after opening the box it would be dead only and if it survived it would appear alive to us but it is not possible that at a same time the cat was Alive and Dead both together.
which means it doesn't make any sense that if we observe it or not but Quantum Physics don't work according to our common sense. Infinite experiments proved that Quantum Particles don't rely on our thinking and always show weird behaviour, it behaves to an extent that in normal life we can't even think about it.
Many World theory is a very exciting theory which describe that "Every possibility comes to reality irrespective of the location, time and even Universe". which means that if Schrödinger's cat is found dead in this this Universe then it would have be found alive in another Universe. this theory explain it like this way, when box was closed then cat was in superposition state which means at that time it was dead and alive both together at a same time and when we open the box, A split happens in this Universe and because of that it's two copies are formed and amongst one of these cat would be found Alive and it would be found Dead in another one. If this theory would somehow proved to be true then it's implications would be Wonderful let us understand how:
Whenever Universe has the options then it forms number of copies of itself, where everything takes place that has a chance of happening. which means a world must be existing where Adolf Hitler had won the ww2, A world must be existing where Dinosaurs still exists and A world must be existing where Humans have developed a lot. Whatever Quantum Physics is wonderful and this world too.
In Classical Physics this UNIVERSE can be described with simplicity because If we study the past behaviour of an object then we can easily tell it's future behaviour. Moreover by it's present behaviour we can easily tell what would have happened to it in the past. for example- If we know the speed with which Earth is revolving around the Sun then we can easily tell, In which month Earth was/will be present at which position. In fact we can tell 2 yrs. ago It was present at which position.
But If talk about Quantum Physics, It completely changes our perspective to observe this UNIVERSE. In this we try to understand the behaviour of sub-atomic particles like- electrons, protons, photons,etc. Here we can't Predict the results of experiment before; If we repeatedly conduct the experiment, then too! . We know that Quantum Particles can be present at multiple Locations at a same time and can behave differently at a same time whiz believed to be Impossible in Normal world. we can't even Logically expect ourselves to be present and behave differently at different Locations.
That's why the Laws of Classical Physics are not applicable in Quantum Physics and the world described according to Quantum Physics can't be seen in Reality. Quantum Physics is considered as weird but Scientists believe that actual word can only be studied through Quantum Physics.
Today's Blog is about a Thought Experiment through which a Physicist known as Schrödinger described that, with Reference to bigger objects the Principles of Quantum Physics are weird and Pointless, this Experiment is Popularly known as Schrödinger Cat Experiment.
Many Experiments of Quantum Physics have proved that till when we don't observe the Quantum Particles, They exists in all the possible states of themselves at the same time which is known as Superposition state and as we observe them through any of the suitable instruments, their wave function collapses and a single possible state is selected from the treasure which becomes our Reality.
Our instruments can only see the state which is called "Result". Which means we can't tell the Result of the experiment without actually conducting it because we can get any of the possibilities as Result.
If it is true then it should be applicable on humans, animals, and everything that we can easily observe because they are also made up of Quantum Particles but we know that this is not true and every easily observable things are observed in a single state only! not more than one. for example- A car, either can be in rest or can be in motion at a time not can be in both rest and motion at a same time.
In this experiment He trapped an Alive cat inside a Box, Along with the cat He also put a radioactive substance, a poisonous gas bottle, a hammer and a radioactive sensor in the box.
The radioactive substance was such that it's probability to decay was 50% and a hammer was attached to the radioactive sensor through a string and the poisonous gas bottle was put on the surface of box such that the heavier part of hammer was present just above to.
As the decaying of radioactive substance starts, sensor detect it and after that the hammer fall on the poisonous gas bottle resulting in death of the cat.
Till when the box is closed we don't know what is happening to the cat inside the box, is it Alive or Dead. And as we open the box, then only we can tell that the cat survived or not.
If we imagine cat as a Quantum Particle and apply the superposition principle then we can say that when box was closed and no one was observing the cat, then cat in the box exists in both of it's possible states. yes! there can be only two possible states only, either it is alive or dead which means at the same time the cat was alive and dead inside the box. when we open the box it's wave function collapses and one state is selected from two of it's possibilities and that state becomes our Reality.
That's the reason if we conduct this experiment repeatedly then every time we would get different outcomes or more specifically sometimes cat would be found Dead and sometimes it would be found Alive.
Our common sense says that when box was closed, at that time only either cat survived or lie dead.
If the cat was dead then after opening the box it would be dead only and if it survived it would appear alive to us but it is not possible that at a same time the cat was Alive and Dead both together.
which means it doesn't make any sense that if we observe it or not but Quantum Physics don't work according to our common sense. Infinite experiments proved that Quantum Particles don't rely on our thinking and always show weird behaviour, it behaves to an extent that in normal life we can't even think about it.
Many World theory is a very exciting theory which describe that "Every possibility comes to reality irrespective of the location, time and even Universe". which means that if Schrödinger's cat is found dead in this this Universe then it would have be found alive in another Universe. this theory explain it like this way, when box was closed then cat was in superposition state which means at that time it was dead and alive both together at a same time and when we open the box, A split happens in this Universe and because of that it's two copies are formed and amongst one of these cat would be found Alive and it would be found Dead in another one. If this theory would somehow proved to be true then it's implications would be Wonderful let us understand how:
Whenever Universe has the options then it forms number of copies of itself, where everything takes place that has a chance of happening. which means a world must be existing where Adolf Hitler had won the ww2, A world must be existing where Dinosaurs still exists and A world must be existing where Humans have developed a lot. Whatever Quantum Physics is wonderful and this world too.
“Nothing is real unless it is observed”
