Spacetime

Definition

Spacetime is a four-dimensional continuum where the three dimensions of space and one dimension of time are intertwined. It forms the fabric of the universe, affected by mass and energy, especially in the presence of massive objects like black holes.

5 Must Know Facts For Your Next Test

1. Albert Einstein's theory of General Relativity describes how spacetime is curved by mass and energy.
2. Black holes create extreme curvature in spacetime due to their immense gravitational pull.
3. The concept of spacetime allows for the prediction of phenomena such as gravitational waves.
4. Time dilation, where time passes more slowly near massive objects, is a consequence of warped spacetime.
5. Light follows curved paths in the presence of massive objects because it travels along the curvature of spacetime.

Review Questions

• How does mass affect spacetime according to General Relativity?
• What phenomenon occurs due to the extreme curvature of spacetime around black holes?
• Explain how light behaves when passing near a massive object in terms of spacetime.

Related terms

General Relativity:

A theory by Albert Einstein that describes gravity as the warping of spacetime by mass and energy.

Gravitational Waves:

Ripples in spacetime caused by accelerated masses, predicted by General Relativity.

Event Horizon:

The boundary around a black hole beyond which nothing can escape, not even light.