Effects of Black Holes on Spacetime

What is the spacetime interval used for in a universe without black holes?

• To measure the distance between stars

• To ensure a consistent order of events

• To determine the size of a black hole

• To calculate the speed of light

What happens to the spacetime interval when a black hole is introduced?

• It becomes positive

• It remains unchanged

• It can flip its sign

• It disappears

What is the Schwarzschild radius?

• The speed of light in a vacuum

• The size of the universe

• The time it takes for light to escape a black hole

• The distance from the center of a black hole to its event horizon

How does gravity affect the future light cone near a massive object?

• It has no effect on the light cone

• It makes the light cone disappear

• It makes the light cone larger

• It tilts the light cone towards the mass

What happens to the perception of time and space inside a black hole?

• Time becomes space-like and space becomes time-like

• Time and space remain the same

• Time stops completely

• Space disappears