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7/30/2019 Tugas Pisika Nino

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Rahino Tri SangajiVIIIa

Science


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Recent discovery in physics

1. Levitating magnet

Nuclear fusionthe melding of atomic nuclei that happens inside starsis a

long-sought goal on Earth. If scientists can achieve it, it could offer a powerful

source of energy with few negative environmental consequences.

Scientists took a step closer to this goal when they announced they'd built

a levitating magnet that created some of the conditions thought to be necessary for

fusion. By suspending a giant donut-shaped magnet in midair, researchers were

able to control the motion of an extremely hot gas of charged particles contained

within the magnet's outer chamber. The density of this gas was close to what'sneeded for nuclear fusion, the researchers said.

2. New antimatter particle

By smashing particles together at close to light speed inside an atom smasher,

scientists created a never-before-seen type of matter: an anti-hypertriton .

This particle is weird in many ways. First, it's not normal matter, but its eerie

opposite, called antimatter, which annihilates whenever it comes into contact with

regular mass. Second, the anti-hypertriton is what's called a "strange" particle,

meaning it contains a rare building block called a strange quark, which isn't present

in the protons and neutrons that make up regular atoms.

The experiment was conducted at the Relativistic Heavy Ion Collider at

Brookhaven National Laboratory in Upton, N.Y.
http://www.livescience.com/environment/nuclear-fusion-magnet-experiment-100128.htmlhttp://www.space.com/scienceastronomy/new-particle-anti-matter-100305.htmlhttp://www.space.com/scienceastronomy/new-particle-anti-matter-100305.htmlhttp://www.livescience.com/environment/nuclear-fusion-magnet-experiment-100128.html


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3. Quark-gluon soup

Another amazing feat of physics came out of Brookhaven's Relativistic HeavyIon Collider this year. scientists announced they'd created a "quark-gluon soup"

where protons and neutrons had broken up into their constituent building blocksquarks and gluons.

It took extremely powerful collisions of gold atoms in the accelerator to achieve

the temperatures necessaryabout 7 trillion degrees Fahrenheit (4 trillion degreesCelsius). These conditions are 250,000 times hotter than the center of the sun and

similar to temperatures seen just after the birth of the universe. They were thehottest temperatures ever reached on Earth.

4. Knots of light

Light may seem to travel a straight line, but sometimes it gets twisted into

knots. researchers reported using a computer-controlled hologram to twist beams

of laser light into pretzel shapes. The holograms, which direct the flow of light,

were specially created to send light in certain directions and shapes.

The researchers used a field of mathematics known as knot theory to study the

resulting loops. These swirls of light, called optical vortices, could have

implications for future laser devices, the physicists said.
http://www.livescience.com/strangenews/big-bang-conditions-quark-soup-100215.htmlhttp://www.livescience.com/technology/tying-light-knots-100117.htmlhttp://www.livescience.com/technology/tying-light-knots-100117.htmlhttp://www.livescience.com/strangenews/big-bang-conditions-quark-soup-100215.html


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5. Spooky entanglementOne of the strangest predictions of the theory of quantum mechanics is thatparticles can become "entangled" so that even after they are separated in space,

when an action is performed on one particle, the other particle responds

immediately.

scientists announced they had measured entanglement in a new kind of system

two separated pairs of vibrating particles. Previous experiments had entangled the

internal properties of particles, such as spin states, but this was the first time

scientists had entangled the particles' pattern of motion, which is a system that

resembles the larger, everyday world.
http://www.livescience.com/strangenews/090603-maco-entanglement.htmlhttp://www.livescience.com/strangenews/090603-maco-entanglement.html


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