What is block hole?, Physics

A blackhole is a region of spacetime from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body inthermodynamics.Quantum field theory in curved spacetime predicts that event horizons emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.

Posted Date: 3/7/2013 6:30:05 AM | Location : United States





Nothing can escape from the surface of the body is called as"Block hole".It is spherical in shape.

Posted by | Posted Date: 3/7/2013 6:30:58 AM


Related Discussions:- What is block hole?, Assignment Help, Ask Question on What is block hole?, Get Answer, Expert's Help, What is block hole? Discussions

Write discussion on What is block hole?
Your posts are moderated
Related Questions
An aluminum rod at a temperature of 100 o Celsius radiates energy at a rate of 10 watts. If its temperature is enhanced to 200 o Celsius, at approximately what rate will it radia


An automobile travels due north with a speed of 93 km/h and an acceleration of 1.6 m/s2. All forces considered, the unbalanced force acting on the auto is

What do you mean by the magnetic moment of a semi circular magnet of radius ‘r' and pole strength ‘m'

Q. If an object isn't moving, no external force acts on it.  No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example:

Define coherence and explain temporal and spatial coherence. Show that visibility is a maxim of coherence. Define the 'Q' factor for a spectral line. Explain coherence length and c

In the Compton effect, a photon of wavelength l collides with a stationary electron.  The wavelength of the emitted photon is: a)  longer than l b)  shorter than l c)

A block initial located 3m up a frictionless inclined plane is given an initial velocity of 6m/s up the ramp. The plane is 10m long and titled by 30 degree. a) How long does it tak

How does the elevation and air pressure affect the boiling point of water? The only factor that explains the boiling point of water at any altitude is the barometric pressure (

A train consists of a 4300-kg locomotive pulling two loaded boxcars. The first boxcar has a mass of 12,700 kg and the second has a mass of 16,300 kg. Presume that the boxcar wheels