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pavelow

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  1. pavelow
    Magnetic Levitation (Maglev) trains are one of the ways electromagnets are used every day.



    Maglev trains carry passengers at speeds of 310 mph. The trains are able to reach such high speeds without falling apart partially because of their sturdy design but also because of their propulsion system. The trains are held up by magnetic forces when they approach higher speeds.the lack of physical contact with rails reduces friction to only that of air resistance, allowing the train to be more stable at high speeds.

    The main issue keeping maglev trains from becoming more common is economical, not technological. Once the remaining problems are solved, these trains will be a better solution for high speed travel than the current bullet trains in use all over the world.
  2. pavelow

    Rail Guns

    By pavelow,

    A military application of electromagnetic force is the rail gun.

    A rail gun is like a regular gun in the sense that it fires a projectile out of a barrel, but it has some major differences.

    A regular gunpowder gun uses a projectile with a firing pin, which is hit by the gun, pressurizing gunpowder, resulting in an explosion which propels the projectile forward. This is a bit inefficient however, because a lot of recoil occurs in the gun because of conservation of momentum, and a lot of excess heat is produced.

    The rail gun propels the projectile differently. Instead of using gunpowder to propel the projectile forward, the gun uses electromagnets along the barrel to accelerate the projectile to high speeds. this results in a less sudden recoil and a more efficient way to shoot a projectile, and as the technology improves, rail guns will eventually replace large guns for military use.
  3. pavelow
    Light is subject to a quantum theory called wave-particle duality. This theory proposes that matter exhibits both properties of a particle and properties of a wave.

    The experiment that shows light's wave-like properties is the double slit experiment. when light was shone through two slits close together, and a screen was placed behind the slits, the impact pattern didn't look the way one would expect a particle impact pattern to look like. After going though the slits, the light diffracted, creating a wave diffraction pattern on the screen, showing light's wave-like properties.

    Light's particle properties are shown in another experiment. Light is passed through "absorber" planes, which don't affect waves. however, when the light passed through the absorbers, the wave after going through the absorber was considerably weaker. This confirmed that light has some particle like properties.

    Light is neither particle nor wave and yet exhibits properties of both, which can be experimentally observed.

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