Understanding Black Holes

What happens to a massive star after it exhausts its nuclear fuel?

• It becomes a planet.

• It explodes in a supernova.

• It becomes a meteor.

• It turns into a comet.

Who first introduced the concept of escape velocity?

• Albert Einstein

• Isaac Newton

• John Michell

• Karl Schwarzschild

What did John Michell call the massive objects with escape velocity greater than the speed of light?

• Black holes

• Dark stars

• White dwarfs

• Neutron stars

What is the name of the region around a black hole from which nothing can escape?

• Photon sphere

• Ergosphere

• Singularity

• Event horizon

How can astronomers detect a black hole if it cannot be seen?

• By listening to its sound

• By measuring its temperature

• By observing its gravitational effects on nearby stars

• By detecting its color

What is a 'stellar mass' black hole?

• A black hole with the mass of a planet

• A black hole with the mass of a galaxy

• A black hole with mass similar to that of stars

• A black hole with no mass

What is the 'no hair theorem' in relation to black holes?

• Black holes have no event horizon.

• Black holes have no gravitational pull.

• Black holes have no distinguishing features except mass, spin, and charge.

• Black holes have no mass.

What is the term for the region where spacetime is dragged along by a spinning black hole?

• Ergosphere

• Photon sphere

• Event horizon

• Singularity

What is the shape of the singularity in a rotating black hole?

• A cube

• A sphere

• A ring

• A point

What ongoing research topic involves black holes potentially forming bridges in the universe?

• Cosmic strings

• Dark matter

• Wormholes

• Quantum entanglement