50 篇博文 含有标签「自然科学」

It seems perfectly smooth. You can cut a distance in half and in half again, forever.

An astronaut could spend seven years in space accelerating toward the speed of light, and by the time he returns nearly 700 years could have passed on Earth.

This is a universe drawn on a disk.

Okay, so according to our brother's mathematicians, a tensor is an algebraic object that describes a multilinear relationship between sets of algebraic objects related to a vector space. Does it make sense?

Many people believe that special relativity is the major hurdle when it comes to interstellar travel, as the speed of light is the upper bound of how fast can you move.

There is one problem regarding black holes that I never truly understood.

Imagine you have a submarine in the ocean able to reach very high velocities.

Probably all of you know that light is an electromagnetic wave.

You strap into the seat, look out the window at the launch pad, and make a decision that every reasonable person on earth would advise against.

I have been asking physicists the same question for more than a year now, and all of them answered straight away without any hesitation.

Right now, particles from space are slamming into the air high above you and shattering into showers.

In the main auditorium at CERN near Geneva, two teams of physicists show their data, one after the other.