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Current Affairs

Black Holes

Date: 18 September 2019 Tags: Space

What are Black Holes?

A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing , no particles or even electromagnetic radiation including light can escape from it.

Background

Black holes have been getting scientific attention from the very beginning. They were hinted at as early as the 1780s. Albert Einstein predicted them in his general theory of relativity.

Formation of Black Holes

  • According to Einstein's theory, a black hole should exhibit just three observable properties: mass, spin, and electric charge.

  •  All other characteristics would be swallowed up by the black hole itself because it acts as a one-way trapdoor.

  • Most black holes are remnants of large stars that die in supernova explosions. There are four types of black holes: stellar, intermediate, supermassive, and miniature.

Evidences of Black Hole

  • They are effectively invisible and scientists use special tools to infer their presence and observe them by the effects of their enormous gravitational fields on nearby matter.

  • The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light.

  • Matter that falls onto a black hole can form an external accretion disk heated by friction, forming some of the brightest objects in the universe.

Significance of Black Hole research

  • Black hole reserch has potential to provide more insight into the formation of universe and its destruction in future.

  • The Balck hole  research also holds answers for space time distortion that makes time travelling possible.