--%>

Explain Hawking radiation

Hawking radiation (S.W. Hawking; 1973): The theory which black holes emit radiation similar to any other hot body. The virtual particle-antiparticle pairs are continuously being made in supposedly empty space. Infrequently, a pair will be made just exterior to the event horizon of a black hole. There are three possibilities as:

•    Both particles are imprisoned by the hole;
•    Both particles flee the hole;
•    One particle flees while another is captured.

The first two situations are straightforward; the virtual particle-antiparticle pair recombines and returns their energy back to the void through the uncertainty principle.

This is the third situation which interests us. In this situation, one of the particles has escaped (and is speeding away to the infinity), whereas the other has been imprisoned by the hole. The escape becomes real and can now be noticed by distant observers. However the captured particle is still virtual; since of this, it has to restore conservation of energy by conveying itself a negative mass-energy. As the hole has absorbed it, the hole loses mass and therefore appears to shrink. From a distance, it comes out as if the hole has released a particle and diminished in mass.

The rate of power emission is proportional to the inverse square of the holes mass; therefore, the smaller a hole gets the faster and faster it emits the Hawking radiation. It leads to a runaway procedure; what happens whenever the hole gets very tiny is not clear; quantum theory seems to point out that some kind of "remnant" may be left behind after the hole has emitted away all of its mass-energy.

   Related Questions in Physics

  • Q : Calculating current in magnetically

    For the magnetically coupled circuit in Figure a, calculate I1 and I2. If the dotted terminals in are changed so that the circuit now becomes that in Figure b, re-calculate I1 and I2.

  • Q : Define Stefan-Boltzmann constant

    Stefan-Boltzmann constant: sigma (Stefan, L. Boltzmann): The constant of proportionality exist in the Stefan-Boltzmann law. It is equivalent to 5.6697 x 10-8 W/m2/K4.

  • Q : Define Fermi paradox Fermi paradox (E.

    Fermi paradox (E. Fermi): E. Fermi's inference, simplified with the phrase, "Where are they?" questioning that when the Galaxy is filled with intelligent and scientific civilizations, why haven't they come to us hitherto? There are nu

  • Q : What is Transition temperature

    Transition temperature: The temperature (that is, dependant on the substance comprised) below that a superconducting material conducts electricity with zero resistance; therefore, the temperature above which a superconductor lose its superconductive p

  • Q : Kirchhoffs rules or Loop rule or Point

    Explain Kirchhoff's rules or Kirchhoff's Loop rule and Point rule? Kirchhoff's rules (G.R. Kirchhoff) <

  • Q : Rest mass energy of the electron What

    What do you mean by the rest mass energy of the electron?

  • Q : Explain Lagrange points Lagrange points

    Lagrange points: The points in the vicinity of two massive bodies (like the Earth and Moon) with each others' relevant gravities balance. There are five, labeled L1 via L5. L1, L2, and L3 lie all along the centerline among the centers

  • Q : Define the term wave fronts What do you

    What do you mean by the term wave fronts? Explain in short.

  • Q : Does solar radiation encompass a

    Does solar radiation encompass a complete spectrum of all the forms of electromagnetic radiation?

  • Q : Problem on magnetically coupled pair

    When one coil of a magnetically coupled pair has a current of 5.0A, the resulting fluxes Φ11 and Φ21 are 0.2mWb and 0.4mWb, respectively.  If the turns are N1 = 500 and N2 = 1500, find L1, L2, M and the coeffici