It is believed if a black hole spins at the speed of light there will be enough centrifugal force to open a aperture forming a ring of a wormhole entrance space ships can safely enter exiting the other end into another universe.

Although seems a logical assumption there are laws of circular motion that tell us it is not as simple as that. So what are they?.

Lets review Alert Einstein's general theory of relativity on gravitational equlelence NSA has been using for the last several decades training astronauts in weightlessness Einstein predicted a 100years ago. If a plan nose dives fast enough trainees astronauts lift off the floor frolicking about in weightless fun.

As Einstein put it motion cancels gravity. In effect the fuselage had become an antigravity device. The opposite holds true.

If the plane climbs upwards fast enough the floor will seem to press against them pinning the astronauts to it as if a stronger gravity.

Einstein must have understood Isaac Newtown's "Were there is a force, ( causing a velocity ) there is a equal and opposite force applied" law. Take a straight line acceleration from 0 to a distance of a 100 miles in a second. ( For those into challenging mathematics how many kmph is that? ).

What would it be like to dash a distance of a 100 miles to stop in a second?

We don't need to be Einstein's to immediately think of G-force. Experience the acceleration of a few kilograms of weight pulling us back into our seats in Rolla coaster is enough to tell us that rides defined as the force of motion pulling back on acceleration. In other words resisting acceleration called inertia. Imagine the "Gs" traveling on a light speed scale.

The opposite applies when we come to a sudden stop. As we stop this force equally resists deceleration pulling us forward. We experience a few kilograms of weight pulling us on in all sudden high speed stops. Newtown's "where there is a force there is a equal and opposite opposing force" law is the key to Einstein's gravitational equivalence in a straight line velocity.

When we ride a marry go round we are riding on the outside edge were most of the force will be because of the distance going round as if the same as the straight line in an endless loop. Fast enough we would experience a few kilograms of weight trying to pull us off. But in the center the distance to circle is smaller where we experience lot less. In a run away emergency can be the place to retreat to.

Reveiwing this shows the center of circling motion has less force than the edge because of distance the motion circles

We can't imagine any marry go rounds faster  than we imagine without realizing the circling G-force ripping apart throwing everything off. If we ride in the very center we will not feel as much force.

If we have a pin in the center of a spinning cardboard sphere with objects placed various spaces apart the pin will experience virtually no force at all. Each object experience more force than the nearest each towards the edge. The first ones to be effected will be the outer edge ones. To throw off the inner orbiting objects we have to increase speed.

Anybody who knows the geometry of circles well will be familiar with what is call ( pie ) pi. that can be applied calculate the circle of circling motion

Bear in mind black hole are spheres of pure gravity at the very center smaller than a particle of the atom weighing well over trillions of times stronger than the gravitational pull ( mass ) of our sun.

If we review the geometry try this experiment. Cut a piece of string round a ball, cut to size and open the string to a straight line. Measuring the length of the string equals the circumference of the ball showing when a straight line is curved into a circle equals the same circumference of the ball. In other words all straight lines are an reflection of the circumference of all circles that equal to the circumference of all spheres.

If we measure a piece of string round a can ( a cylinder ) cut to size opening to a straight line we measuring across the can, we can use division to divide the length of the string by the diameter always end up with the pi value. The diameter of a sphere is no different when we take the inside.

No matter the diameter ill always be a constant 3.142 and is always accurate to three decimal places. In other words Pi to an accuracy of 3 decimal places equals circumference over diameter.

It is no coincidence we can line up the string across the inside any sphere, once, twice three times with a little bit more left over about about a 7th. A pen and paper or any two dollar calculator will show pi equals 1 divide 7 add 3. ( 3.142857 respectively ). Once again accurate to 3 decimal places Thus Pi not only equals circumference over diameter, also 3 plus 1 over 7

Calculators tell us the decimal value as far as the screen allows means the decimal value is never ending. Mathematicians have been trying to find the end of the value for centuries. You'll find Gunnies book of record entries of individuals who have recited pi to thousands of decimal places off the top of their heads. In our case case we normally round off to a couple of about two places to the nearest.

The following since matching strings on drawn on paper to represent across a sphere is hard to do the best bet is to arrange pins round the rim of the circumference as guides.

Using the law of mathematics we can apply to any straight line when rolled into a circle divided by pi Rechecking the diameter of a can will agree across a sphere of the same circumference. Circle diameters equals straight lines over pi

We can use the law of mathematics from another angle to determine the straight line of a circumference opened to a straight line. Straight lines equals diameter times pi We can look at another angle were pi times the diameter

Like clock arms from the center to the edge of the circle is a radius. Spheres are no different when from the center to the inside edge

Light is not a flat plane. It is a spherical volume spread out across the entire universe in just under a distance of 300,000km in every direction per second. Under such circumstances It is hard to imagine light bent into a loop. The only thing we can imagine is a complete distortion of of the volume of the light second.

The only thing in the universe that could possibly distort light like that is a black hole. Light needs to travel to our eyes in a form a straight line perspective to see it. So if it's bent into a circle it's not traveling in a straight but the volume shrunk into a sphere not traveling to our eyes. We should not see thing except remarkably like a black hole.

We can not only apply all the pi formulae to measure the radius of a sphere but also the entire sum of the spinning sphere measuring the full revolution though time as we do with earth in a 24 hour period in this case the volume of a black hole on alight speed scale.

Knowing the length of a radius the diameter can be found by doubling the length times pi giving the circumference of the circle and correspondingly a circumference of the sphere.

Quantum Physics tells us the radius in the center of a black hole ( the singularity ) cannot be any shorter than a Planck length. A Planck length is 30 decimal zeros 628. It seems mind boggling well over a trillion times smaller than the thickness of a human hair. In other words black holes are not infinitely dense with a zero volume most people believe. They arte are finite things.

Universe books and web page images illustrating black holes in photographic style is misleading as we don't see any black disc of the sort only observe the effects of a gravitational effect on light. The black disc makes them look 1,000,000s of km across to the scale to the space image. The edges is only the closest we can get to illustrate where light disappears called the event horizon. Since we cannot see black holes the closest we can come to measuring the size can only be speculated any unusual light behavior we happen to observe.

Because of the unbelievable tiny size of the singularity, the extent of the diameter of the event horizon can only be a speculation that is determined only by the behavior of light.