BLACK HOLE - theory explained

     BLACK HOLE:

         what is black hole ?

             black hole is a part of the space which is having infinite gravity such that even light also can't escape from it , hence no light is emitted by them . so they look like black tunnel (or hole).

         

first image of a black hole

     HOW BLACK HOLES ARE FORMED ?

                  The basic particle of every quantity is "ATOM".  since we know that elements are formed by the  combination of same kind of  atoms , compounds are formed by the  combination of different  elements in some specific ratio. so same thing happens here as well............

                  THEN  HOW??

      answer-----:  Atoms by combining each other goes on forming elements .....by emitting radiation. They    goes on converting....like this →  (H) hydrogen to  (He) helium to (C) carbon to (Ne) neon to (Si) silicon and finaly  iron(Fe). the radiation emitted during conversion of elements will oppose the gravity so star will be in stable form . but when it becomes iron (Fe) ,emission of radiation will be  stopped ,because iron won't  emit radiation . now gravity starts to compress the star .  if star mass is much greater than our sun  then it converts to BLACK HOLE . if it is not having enough mass then it converts to NEUTRON STAR.

 evolution of star with it's composition 

 WHAT AFTER THE FORMATION OF BLACK HOLE........

        The star is so dense that space will curve at the bottom . the whole mass is compressed in a small point . therefore it is having INFINITE GRAVITY.  the black hole is having an boundary and that we call as "EVENT  HORIZON". event horizon is something from where we can't see anything inside and we can't escape from it  if we fall .

black hole  EVENT HORIZON and ACCRETION DISC 

HOW TO FIND A BLACK HOLE......

    Since we know that black holes are having glowing disc called  "ACCRETION DISC" made up of gases which are moving ( but not fallen in) with a very high speed   producing X-rays , with the help of these X-rays we can find black hole  OR else we can find it  by observing and analysing the motions of stars.

------------ THIS IS ALL ABOUT BLACK HOLE 

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