Understanding Black Holes: A Deep Dive

What triggers the formation of a black hole after a high-mass star dies?

• A supernova explosion

• A decrease in gravitational pull

• An increase in solar flares

• The formation of new stars

What is the escape velocity of Earth?

• 9.8 km/s

• 11.2 km/s

• 15.6 km/s

• 5.5 km/s

Why is it impossible to see a black hole directly?

• They are hidden by other stars

• They are too small

• They are too far away

• They emit no light

What is the Schwarzschild radius?

• The core of a black hole

• The radius at which escape velocity equals the speed of light

• The visible boundary of a black hole

• The distance from a black hole at which light can escape

What does the event horizon of a black hole represent?

• The core where matter is crushed

• The boundary beyond which light cannot escape

• The location where matter enters the black hole

• The distance at which gravity becomes infinite

How can scientists detect the presence of a black hole?

• Through direct imaging

• By observing emitted light

• By measuring sound waves

• By detecting X-rays from surrounding materials

What evidence supports the existence of supermassive black holes in galaxies?

• Observation of high-energy gamma rays

• Detection of large star clusters moving rapidly around a central region

• Measurements of high temperatures in galactic centers

• Direct imaging of black holes

What would happen to Earth's orbit if the Sun turned into a black hole?

• Earth would spiral into the black hole

• Earth would be ejected from the solar system

• The orbit would become highly elliptical

• The orbit would remain the same

How long would it take for a solar-mass black hole to evaporate?

• 10 to the power of 75 years

• 10 to the power of 67 years

• 10 to the power of 100 years

• 10 to the power of 50 years

What is Hawking radiation?

• Radiation resulting from quantum fluctuations near the event horizon

• Heat emitted by black holes

• Radiation emitted during a supernova

• Light emitted by black holes