HAWKING RADIATION
HAWKING RADIATION
Contents
• What is Hawking Radiation ?• Introduction to Black Holes• Properties of Black Holes• Videos to explain Hawking Radiation• Black Hole Evaporation
What is Hawking Radiation ?
• Hawking radiation is blackbody radiation that is predicted to be released by black holes, due to quantum effects near the event horizon
• named after the physicist Stephen Hawking• Theoretical argument for its existence was
proposed in 1974
Black hole showing hawking radiation
Introduction to Black holes
• Region of space resulting from the collapse of a star
• Region of space with strong gravitational field that even light cannot escape it.
Properties of Black Holes… e.g.
Time dilation, gravitational redshift,“spaghettification”
“No hair theorem”
…. Hawking radiation…. Kerr black Holes….
red-shifted
red-shifted intooblivion
From inside this region
no informationcan escape
Types of black holes
• Stellar : When a super massive star collapse• Supermassive : likely exist in the centers of
most galaxies• Miniature : mass much smaller than that of
our Sun (theoretical)
….having FUN !
Hawking Radiation Detailed..
Videos Explaining Hawking Radiation
• Hawking radiation explained • Short review of Hawking Radiation
12
• The energy needed to create the real particles comes from the gravitational field of the black hole.
• Hence, the emission of Hawking radiation reduces the mass of the black hole. As the process continues, the black hole will finally disappear. This is called black hole evaporation.
• In fact, the time required for evaporation is given by
yearskgMtevap
3
1210
1010
Black Hole Evaporation