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
Similarities in Construction of MOSFET and JFET (i)  JFET is a three terminal semiconductor device (source, drain and gate) in which current conduction is by majority carriers

Beat period : The time interval among two successive beats is called as beat period. Beat frequency : The number of beats given per second is called as beat frequency.

WHAT IS THE MEAN OF HEAT

define the coefficient of friction

Q. Write the equation of a 25 cycle current sine wave having rms value of 30 A. Data:               ν = 25 Hz, Irms = 30 A Solution:         i = I o sin ωt   =

what is the motion of an oscillating column in a u-tube?

What is the principle and ray diagram of a compound microscope

An elementary particle is: (1)An element present in a compound      (2)An atom present in an element   (3)A sub-atomic particle (4)A fragment of an atom Ans: (3)A s

1. What is the principle of gas filled detectors? 2. What are nuclear radiations or particle detectors?

A model elevator A working model of an elevator can simply be made from easy materials. For the rotating drums or sheaves, metal coffee tin will do. With a hammer and a big nai