Research Paper Theory Relativity

Research Paper Theory Relativity-54
Any object in a big gravity field is accelerating, so it will also experience time dilation.Meanwhile, the astronaut's spaceship will experience length contraction, which means that if you took a picture of the spacecraft as it flew by, it would look as though it were "squished" in the direction of motion.

Any object in a big gravity field is accelerating, so it will also experience time dilation.Meanwhile, the astronaut's spaceship will experience length contraction, which means that if you took a picture of the spacecraft as it flew by, it would look as though it were "squished" in the direction of motion.This is because even though satellites aren't moving at anything close to the speed of light, they are still going pretty fast.

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But you don't necessarily need a spaceship zooming at near the speed of light to see relativistic effects.

In fact, there are several instances of relativity that we can see in our daily lives, and even technologies we use today that demonstrate that Einstein was right. Magnetism is a relativistic effect, and if you use electricity you can thank relativity for the fact that generators work at all.

To the astronaut on board, however, all would seem normal.

In addition, the mass of the spaceship would appear to increase from the point of view of people on Earth.

[Top 10 Inventions that Changed the World]Most metals are shiny because the electrons in the atoms jump from different energy levels, or "orbitals." Some photons that hit the metal get absorbed and re-emitted, though at a longer wavelength. Gold is a heavy atom, so the inner electrons are moving fast enough that the relativistic mass increase is significant, as well as the length contraction.

As a result, the electrons are spinning around the nucleus in shorter paths, with more momentum.

But now, picture the wire at rest and imagine the magnet is moving.

In this case, the charged particles in the wire (the electrons and protons) aren't moving anymore, so the magnetic field shouldn't be affecting them. This shows that there is no privileged frame of reference.

Since each satellite is 12,600 miles (20,300 kilometers) above Earth and moves at about 6,000 miles per hour (10,000 km/h), there's a relativistic time dilation that tacks on about 4 microseconds each day.

Add in the effects of gravity and the figure goes up to about 7 microseconds. The difference is very real: if no relativistic effects were accounted for, a GPS unit that tells you it's a half mile (0.8 km) to the next gas station would be 5 miles (8 km) off after only one day.


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