Quantum physics

Everything was looking much accurate and theoretical, the force which attract the apple towards the ground is the same force which keeps moon in its orbit. Every object in this try to keeps its state (Newton’s first law of motion), every stuff in this universe with mass have property to attract another stuff with mass (i.e. Gravity). The earth revolves around the sun due to the same force which holds you on ground. At that time scientist thought that these laws are applicable for every stuff and everywhere in this universe but, this concept was wrong.

In the year 1920, there was the rise of new branch in physics which deals with very small particle (i.e. elementary particles). And soon physicists found that there is totally different world for elementary particle which looks very strange from our point of view. In our world nothing could be happen without any reason but in quantum world everything could be happen without any reason. For example: in normal world a ball cannot move unless any force applied on it but, an electron can move, change its velocity without any reason. And this concept raised with very simple but revolutionary experiment (i.e. double slit experiment). In this experiment, scientists thrown electrons through a wall having two very thin openings and supposed that electrons will strike the screen which is just straight to the slits but that not happened. Electrons starts deviating from their path. When physicist studied that pattern then they found that electrons behaved like a wave and the pattern which observed on the screen is the result of destructive and constructive interference of electrons. Scientist thought that, it may be happened because they throw many electrons at a time. So, they repeat this experiment, and at this time they throw only one electron at a time. After throwing many electrons they found the same pattern which appeared first. This phenomenon shocked them, but they got much shocking result when they repeat this experiment after putting a detector over one slit. At this time, they found that whole wave pattern disappeared or at this time electrons just hit the predicted place (i.e. just behind the slits).

With this simple experiment and weird result physicists contributed that quantum world is totally weird place where laws of physics could be broken. In quantum world a particle can be exists at many places at exact same time and they may have different velocities until we observe it and all property (i.e. velocity, location etc) of a particle is combinedly called as its ‘Wave Function’.

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