Hawking radiation, Physics

Hawking radiation (S.W. Hawking; 1973):

Black holes emit radiation such as any other hot body. Virtual particle-antiparticle pairs are being formed in supposedly empty space constantly. Sporadically, a pair will be formed just outside the event horizon of a black hole. There are three possibilities which are following:

a) both of the particles are captured by the hole;

b) both of the particles escape the hole;

c) one particle escapes whereas the other is captured.

The first two cases are simple; the virtual particle-antiparticle pair recombines and returns their energy back to the void by the uncertainty principle.

It is the third case which interests us. In this case, one of the particles has escaped (speeding away to infinity), whereas the other has been captured through the hole. The escapee becomes real and now can be detected through distant observers. However the captured particle is virtual still; due to this, it ought to restore conservation of energy through assigning itself a negative mass-energy. As the hole has absorbed it, the hole loses mass and therefore appears to shrink. From a distance, it seems as if the hole has emitted a particle and decrease in mass.

The rate of power emission is proportional to the inverse square of the mass of hole; therefore, the smaller a hole gets the faster & faster it emits Hawking radiation. It leads to a runaway procedure; what happens while the hole gets extremely small is unclear; quantum theory appears to indicate that some sort of "remnant" might be left behind after the hole has emitted away all its mass-energy.

Posted Date: 3/28/2013 3:22:04 AM | Location : United States







Related Discussions:- Hawking radiation, Assignment Help, Ask Question on Hawking radiation, Get Answer, Expert's Help, Hawking radiation Discussions

Write discussion on Hawking radiation
Your posts are moderated
Related Questions
#how entropy tells which process is spontaneous and which is non spontaneous.i also wana know that although 2nd law of thermodynamic is for heat engine and heat pump how it is rela

Suppose that we have a monochromatic non-diverging beam of x rays    that are incident on a slab of Pb. Inside the Pb plate there are three apertures (openings) that allow the beam

Derivation of venturimeter

A 6kg crate originally at rest is pulled to the right along a horizontal plane with a constant horizontal force of 12N. a)find the velocity of the crate once it has moved 3m on th

Interference of Rectangular Pulses: Two rectangular wave pulses are on a stretched string traveling toward each other. Each pulse is traveling with a speed of 1.00 mm/s. If the lea

Q. Figure s (a) and (b) show refraction of a ray in air incident at 60°with the normal to a glass Answer According to the given figure for the glass-air interface:

Derive the equation of uniformly acceleration motion by analytical method.

A Surfer sits on his board waiting as waves go by to catch a ride back to shore. Assuming the waves can be modelled as a sine wave given by h (x,t) = 1.75 sin (0.03 Πx - 0.15 Πt) [

examples of liked paralled forces

Ripple tank The concept of reflection and refraction of light waves can be understood by the study of reflection and refraction of waves on water. The water waves travel