Quantum Uncertainty
- Shubham Nandasana
- Apr 2, 2019
- 2 min read
There are a wave - particle duality is present in the heart of the quantum physics.
In classical physics an electron has definite position in space and it is moving in definite position(direction) due to its particle behaviour so you calculate everything that will ever happen with the electron.
But according to quantum physics ab electron is never located at precise place because of its wave nature and never sure where it is going - this called principle of uncertainty.
Take an example to understand this very well
an electron is confined to a region of width 5 × 10^-11 m which is it uncertainty in position Δx.estimate minimum uncertainty in its momentum.
now we have following equation associate with quantum uncertainty,
Δp × Δx ≥ h/4π so, Δp ≥ h/4π × Δx
Δp = 6.62607004 × 10-34/ 5*10-11× 4× 3.14
= 1.05 × 10-24 kg*m/s
so there is 1.05 × 10-24 kg*m/s is uncertainty in momentum of electron.
Application :
As we seen in quick fact that there are so many application of quantum physics even some of the processes are breakdown without this principle but amongst them there one practical application of quantum physics that is called quantum computer.
we know that ordinary computer are based on switches that can be either on or off (0 or 1) but in true quantum computer has switches (single atom or electron) that can be in both on and off at the same time so called superposition which makes computer immensely more powerful.
Quantum inside the Sun :
Astronomer are able to figure out how hot interior of the sun must be in order to hold itself up against gravity,but this lead to problem because proton (positive charge) repel each other and to move very fast before they will collide and stick together.
Classical physics interior of the sun not hot enough for this to happen.but quantum physics has answer when 2 proton are closed together but not close enough to touch according to classical theory quantum uncertainty mean that there is possibility(probability) that they might touch.
Another way of understanding this is to think of proton as wave reaching out to each other,result is that the proton can fuse - tunneling through barrier of classical electrical repulsion.
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