Alcubierre showed that the warp drive from “Star Trek” was in fact theoretically possible. Proxima Centauri here we come, right? Unfortunately, Alcubierre’s method of compressing spacetime had one problem: it requires negative energy or negative mass.

The Alcubierre drive, at its core, is just a deformation added on flat spacetime as a bump function (it is everywhere flat except for a compact region of spacetime). This deformation moves around, and there are no upper speeds dictated by general relativity.

Although “the mass-energy of the Voyager 1 space probe” may not sound like much, if you convert the 722 kilogram Voyager mass into raw energy (using Einstein’s famous mass-energy equivalence equation: E=mc2), White’s warp drive would require 6.5×1019 Joules (65 exajoules) to create a warp bubble.

In layman’s terms, the Alcubierre Drive achieves FTL travel by stretching the fabric of space-time in a wave, causing the space ahead of it to contract while the space behind it expands. By the same token, such bubbles can appear in a previously flat region of space-time and exceed the speed of light.

If this is a Star Trek vs. Star Wars question, then hyperdrive is faster than warp drive. It took a warp drive ship 7 years and a lot of cheating to cross a quarter of the galaxy. Hyperdrive ships routinely cross the entire galaxy in a matter of days.

blue

In the middle of the spectrum resides the color green, at around 555 nanometers. This wavelength is where our perception is at its best. Because of its position in the center of the spectrum, both blue and red light waves are enhanced and better perceived with the help of green waves.

violet

Blue

light energy

The invisible energy is the energy carried away by particles that do not deposit all their energy in the atmosphere. It has traditionally been calculated using Monte Carlo simulations that are dependent on the assumed primary particle mass and on model predictions for neutrino and muon production.

Electromagnetic waves are invisible forms of energy that travel though the universe. However, you can “see” some of the results of this energy. The light that our eyes can see is actually part of the electromagnetic spectrum.

‘Energy’ is not visible because it is a human concept! It is not a physical reality.

Light energy

Two components of sunlight which are not visible to us are infrared rays and ultraviolet rays because both rays do not lie in visible spectrum of sunlight.