How Big Can Black Holes Grow?

The video explores the nature and growth of black holes, explaining how they accumulate mass through accretion and the limits imposed by gravitational forces. It introduces the concept of the innermost stable circular orbit (ISCO) and its role in black hole growth. Theoretical mass limits for black holes are discussed, along with the potential for growth through mergers. The video concludes with the idea that massive black holes can only grow by colliding with others.

How do black holes primarily grow in size?

• By emitting radiation

• By expanding their event horizon

• By attracting matter due to their gravitational pull

• By sucking in matter like a vacuum cleaner

What is the innermost stable circular orbit (ISCO) in relation to a black hole?

• The center of the black hole

• The inner edge of the accretion disk

• The outer edge of the event horizon

• The point where light cannot escape

What happens to the ISCO as a black hole becomes more massive?

• It disappears completely

• It remains at a fixed distance

• It moves closer to the black hole

• It moves outward, allowing more matter to be consumed

What is the theoretical maximum mass range for black holes?

• Between 500 and 1000 billion solar masses

• Between 100 and 500 billion solar masses

• Between 50 and 270 billion solar masses

• Between 10 and 100 billion solar masses

How can black holes grow beyond their theoretical mass limit?

• By consuming more stars

• By merging with other black holes

• By expanding their event horizon

• By increasing their spin