THE BEGINNING OF TIME PART 2

The idea of Hawking radiation was given by Stephen. W Hawking a gifted theoretical physicist. The entropy of a black hole and Hawking radiation should have the same temperature given by the surface gravity, within a numerical factor of the order of unity.

In addition, Hawking radiation should have a thermal spectrum, which creates an information paradox However, the thermality should be limited by grey body factors at the very least. It has been proposed that the physics of Hawking radiation could be verified in an analogue system an idea that has been carefully studied and developed theoretically Classical white-hole analogues have been investigated experimental, and other analogue systems have been presented. Hawking radiation, Radiation theoretically emitted from just outside the horizon of a black hole.

Allowing us to predict that some particles can indeed escape a blackhole. Now, a blackhole is not black at all but glows with heat radiation. The subatomic particle pairs (photons, neutrinos, and some massive particles) arising naturally near the event horizon may result in one particle’s escaping the vicinity of the black hole while the other particle, of negative energy disappears into it. The steady emission of heat energy causes the black hole to lose mass which over time leads to the blackhole to vanish which results from a final burst of radiation which occurs from a spectacular explosion. So, first a star itself vanishes and then the blackhole itself vanishes.

Which is in accordance with the second law of thermodynamics which states that the total entropy of an isolated system can never decrease over time, and is constant if and only if all processes are reversible. Isolated systems spontaneously evolve towards thermodynamic equilibrium, the state with maximum Entropy.

Why should black holes glow?

Whenever matter enters a black hole, it is effectively locked away from the rest of the Universe. This also removes a measure of disorder; a characteristic physicists call entropy.
Since this removal of matter leaves the Universe less disordered, it was thought to break the second law of thermodynamics.

A physics student from Princeton in the US named Jacob Bekenstein pointed out that the boundary surrounding the space most affected by a black hole’s insane gravity – a ‘surface’ called an event horizon – should increase in area whenever matter falls in.
He showed how this area represents the measure of entropy that would otherwise be lost, a suggestion that should solve the paradox.
Hawking wasn’t so sure. Entropy is another way of describing heat energy, which necessarily emits radiation. If an event horizon has entropy, it should glow in some way, meaning black holes wouldn’t be so black after all.
In his efforts to disprove Bekenstein’s seemingly absurd suggestion, Hawking discussed it with other physicists and attempted to show using mathematical models it wasn’t possible.
Instead, he discovered black holes really do seem to shine with cold light.
The Boundary Conditions of the Universe

The questions of what the boundary conditions of thy universe are and where they should be imposed are considered. It is suggested that the Euclidean approach be adopted and that the path integral for quantum gravity be evaluated over positive definite metrics. If these metrics are taken to be compact, the need to specify any boundary conditions for the universe would be avoided. The Euclidean aimed at determining the shape of the Universe through the approach of Euclid. There are two inter related questions to this approach first being the geometry: the fine-grained local measurements of things like angles and areas. The other is about its topology: how these local pieces are stitched into an overarching shape.
Cosmological evidence suggests that the part of the universe we can see is smooth and homogenous, at least approximately.

Ever since the dawn of civilisation people have craved for the understanding of the underlined order of the world. According to Professor Stephen Hawking there ought to be something very special about the boundary conditions of the Universe.
And what can be more special than the fact that there is no boundary of the Universe. Similarly, there should be no boundary to human endeavour. We all are different like the sub atomic particles. However bad life may seem there is always something one can do and succeed at while there’s life there is hope