--%>
Assignment Help - homework help

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 : Explain Coanda effect Coanda effect:

    Coanda effect: The effect which points out that a fluid tends to flow all along a surface, instead of flowing via free space.

    		•
  • Q : Define Ohm or SI unit of electric

    Ohm: Omega: O (after G. Ohm, 1787-1854) The derived SI unit of electric resistance, stated as the resistance among two points on a conductor whenever a constant potential difference of 1 V generates a current of 1 A in the conductor;

    		•
  • Q : What is Refraction law Refraction law:

    Refraction law: For a wave-front travelling via a boundary among two media, the first with a refractive index of n1, and the other with one of n2, the angle of incidence theta is associated to the angle of refraction phi by:

    		•
  • Q : What do you mean by the term cardiac

    What do you mean by the term cardiac output? Briefly explain it.

    		•
  • Q : Explain Tachyon Tachyon: The purely

    Tachyon: The purely speculative particle that is supposed to travel faster than light. According to Sir Einstein's equations of special relativity, a particle with imaginary rest mass and a velocity more than c would contain a real momentum and energy

    		•
  • Q : Define Pseudoforce Pseudoforce : The

    Pseudoforce: The "force" that arises as an observer is plainly treating an accelerating frame as an inertial one.

    		•
  • Q : Define Copernican principle Copernican

    Copernican principle (N. Copernicus): The idea, recommended by Copernicus, that the Sun, not the Earth, is at the center of the earth. We now know that neither idea is accurate (that is, the Sun is not even situated at the center of o

    		•
  • Q : Problem on two coupled coils connected

    In a series adding connection, two coupled coils have equivalent inductances LA; in a series opposing connection, LB. Determine an expression for M in terms of LA and LB. What does the outcome suggest?

    		•
  • 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 : Difference between the electron and a

    Write down the vital difference between the electron and a beta ray?

    		•