Tag

Curvature

All articles tagged with #curvature

science1 year ago

Why the Earth Appears Flat Despite Its Round Shape

The Earth appears flat to us because we are small creatures living on a vast sphere, making it difficult to perceive its curvature from the ground. Our eyes can only see a limited horizon, about 3 miles, which isn't enough to notice the Earth's roundness. To see the curvature, one must be at a high altitude, like in a plane or from space. Additionally, Earth is not a perfect sphere but an oblate spheroid, slightly wider at the equator due to its rotation.

science-and-technology2 years ago

"Unlocking the Secrets of the Universe: Exploring Alternate Cosmology in a Lab"

Researchers in Germany have created a tabletop quantum field simulation to explore possible features of the early Universe shortly after the Big Bang. By using magnets and lasers to control a sample of potassium-39 atoms held close to absolute zero, they were able to simulate a Universe with different curvatures. The experiment involved trapping the atoms in a two-dimensional layer and cooling them to a quantum-mechanical state known as a Bose-Einstein condensate. The results showed that it is possible to simulate spatially curved and expanding spacetimes, providing insights into the behavior of the early Universe.