General Relativity: Space Comes Alive

Question 1

General Relativity

Answer 1

It describes gravity as the curvature of spacetime caused by the presence of mass and energy

Question 2

Here are some of the notable tests of the theory:

Answer 2

Precession of Mercury’s Orbit: Gravitational Redshift: Gravitational Time Dilation: General relativity predicts that time runs slower in a strong gravitational field. Deflection of Light by Gravity:

Question 3

Black Holes

Answer 3

They are regions in space where gravity is so strong that nothing, not even light, can escape their gravitational pull. They form when massive stars undergo gravitational collapse, concentrating a huge amount of mass into a small volume

Question 4

Cosmology and the expanding universe

Answer 4

Cosmology is the scientific study of the origin, evolution, and structure of the universe as a whole. One of the most fundamental discoveries in cosmology is the observation that the universe is expanding

Question 5

Does the Big Bang have a centre?

Answer 5

According to our current understanding of the Big Bang theory, the universe does not have a specific center in the sense of a central point within space where the explosion originated. Instead, the Big Bang was an event that occurred everywhere in the universe simultaneously.