Finally बना लिया हमने Particle Detector | How we build our own Particle detector | Cloud Chamber

There’s invisible radiation all around us. Until 1896, no one knew it existed. But then Henri Becquerel discovered that rocks containing uranium produced rays that blackened photographic paper.
Now we know that many substances are radioactive - they give out particles which travel through the air until they are absorbed, either by the air itself or by some other material that blocks their path.
A cloud chamber is a good way to show up the radiation which is present in our environment. This is called background radiation.
Looking into a cloud chamber you see the tracks of electrically charged particles as they pass through the chamber.
The space inside the chamber is filled with alcohol vapour and, as a particle passes through, tiny droplets of alcohol form, showing up its track. It’s a bit like the vapour trails you see when a jet aircraft flies through the high, cold atmosphere.
The charged particles which produce tracks in a cloud chamber are alpha and beta particles (from radioactive atoms), and protons and muons (from space).
Cosmic rays are high-energy subatomic particles that constantly bombard the Earth from outer space. Thousands of these particles pass through our planet, and through us, every second. This natural radiation is harmless and invisible, but the tracks that the particles leave behind can be seen using a cloud chamber.
Alpha and beta particles come from radioactive materials in our environment: potassium, uranium and thorium in building materials and ground rocks
radon in the atmosphere
Muons are like heavy electrons. They shower down on us when very energetic radiation from space (cosmic rays) strikes molecules high in the atmosphere, smashing up air molecules.
And, because we human beings are made of materials from our environment which we have taken in as our food and drink, we too are slightly radioactive.
At the bottom of the chamber is a metal plate cooled to about -35°C. You can see a thin film of liquid alcohol on top of it.
At the top of the chamber is a glass plate with fine heating wires. Alcohol is evaporated from this plate at a temperature of about 50°C.
In this way the chamber is filled with alcohol vapour; warmer at the top than the bottom.
When a particle passes through the region where the vapour is coldest it causes condensation. The small droplets of alcohol show where the particle has passed through.
You can tell from the irregular particle tracks that they lose energy as they interact with air molecules. The straightest tracks are from the fastest, most energetic particles.
Now to know more watch out this full video till the end.
Thanks for watching.
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Finally बना लिया हमने Particle Detector | How we build our own Particle detector | Cloud Chamber
FAIR-USE COPYRIGHT DISCLAIMER This video is meant for Educational/Inspirational purpose only. We do not own any copyrights, all the rights go to their respective owners. The sole purpose of this video is to inspire, empower and educate the viewers.

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