BLACK HOLE_001

Black hole. what is that thing. most of us have heard about this. but have you the correct concept of what is that thing really is? If not don't worry . 

Black whole can normally  be said as a black coloured hole in space. wait , a hole in space? how can it be possible? yes its true . its a hole in 3d space caused by infinte mass of a sphere which has a volume of infinitely less than 1 ,i.e., (1/∞). but not 0.  

When a star which has mass of about 20 times of that of sun, it becomes a blackhole after death. the process of being black hole is so complicated than I cannot write it all here . But I will give the basic concept(at least I'll try).

You should be aquinted with a term named schwarzschild radius .  If an object is shrinked into its schwarzschild radius it will be a black hole. schwarzschild radius is directly proportional to its V or volume. In fact in quantum world a lot of black hole birthing but they are too small and too less stable to harm us. 

You have to know what space time is. Shortly it is 4d hyper space which is combination of 3d or SPACE and 4d or TIME .  if we put a small paper cut inside a bathtub we can imagine the tub as space time and the paper(thinking it as 2d with respect to us) as 3d .  it means if we draw a sphere as 4d we have to draw a square inside to define that as a 3d cube. In 3d reallity  we cannot actually draw 4d as perfect as it is.

Therefore we draw the 4d hyper space i.e. space time as 3d curtain. 

Now if we Take ball and put it on the curtain we can say that as a sun. now suns always push out its resources ie gases and radioactive particles. due to its own gravity it always try to shrink inside of it but before getting at the Addington limit it push out some gases. So this outward force balances the inward force and makes the volume of the sun constant. but when these fules are finished there is no outward force to counter the inward force . so normally it shrinks . If thw sun is too much big 20 times larger than our sun, its schwarzschild radius will be bigger also. That means it will easily shrink into its schwarzschild radius. 

when we put a ball on the curtain it makes a gutter on it. samely anny 3d object which have mass makes a gutter on 4d sapce time. 

as much the mass increases the much the gutter becomes deeper. That much the gravitational force or pull increases , as the gutter is the real cause of grivity, being proportional to mass. Now when the sun shrinks its density increses and volume decreases but mass remains the same. It means in a unit volume the mass increases. so that the gutter on spacetime becomes smaller but deeper and also the gravity becomes higher.

When the sun shrinks into its schwarzschild radius the density becomes ∞ and volume becomes (1/∞) . assuming the volume as unit volume we can say the mass becomes ∞ and  it creates a gutter in ∞ly small area on spacetime. as mass is ∞ the depth of gutter becomes also infinity. That means two lines on space time graph will never meet again at that region where the shrinked sun is. It actally means that there has become a hole in the curtain ie space time. Therefore this is called Black 'Hole' .

Now we underatand why it is hole but why is it called black?

Let's check out that on my upcoming post.

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