The Schwarzschild radius of a body is proportional to its mass and therefore to its volume, assuming that the body has a constant mass-density. … The Schwarzschild radius of the supermassive black hole at the Galactic Center of the Milky Way is
approximately 12 million kilometres
.
What is the radius of black hole?
The radius of a black hole is related to its mass by the simple formula
R = 3 M
,where M is the mass of the black hole in units of the sun’s mass, and R is the radius of the Event Horizon in kilometers.
What does the Schwarzschild radius of a black hole mean?
Schwarzschild radius, also called gravitational radius,
the radius below which the gravitational attraction between the particles of a body must cause it to undergo irreversible gravitational collapse
. This phenomenon is thought to be the final fate of the more massive stars (see black hole).
What is the meaning of the Schwarzschild radius around a black hole quizlet?
the mass of a blackhole. The event horizon (Schwarzschild radius) around a black hole
marks the boundary where the escape velocity is equal to the the speed of light
.
Is a black hole smaller than its Schwarzschild radius?
Any object that is smaller than its Schwarzschild radius is a
black hole
– in other words, anything with an escape velocity greater than the speed of light is a black hole. For something the mass of our sun would need to be squeezed into a volume with a radius of about 3 km.
Why do we call it a black hole?
A black hole is
black because it absorbs all the light that hits it
. It reflects nothing, just like a perfect black body in thermodynamics. Under quantum mechanics, black holes have a temperature and emit Hawking radiation, which makes them slowly get smaller.
How much do we need to compress the Earth to turn it into a black hole?
After just a few minutes more —
21 to 22 minutes total
— the entire mass of the Earth would have collapsed into a black hole just 1.75 centimeters (0.69”) in diameter: the inevitable result of an Earth’s mass worth of material collapsing into a black hole. When matter collapses, it can inevitably form a black hole.
Will a black hole come to earth?
Absolutely not
. While a black hole does have an immense gravitational field, they are only “dangerous” if you get very close to them. … It would get very dark of course and very cold, but the black hole’s gravity at our distance from it would not be a concern. Is there life on other planets?
What’s inside a black hole?
HOST PADI BOYD: While they may seem like a hole in the sky because they don’t produce light, a black hole is not empty, It’s actually
a lot of matter condensed into a single point
. This point is known as a singularity.
Why are black holes different sizes?
Different types of black holes have very different masses. … Because
there is such a huge leap in sizes of black holes
, between stellar-mass and supermassive black holes, it has been hypothesized that a class of intermediate-mass black holes also exists. The black holes would be hundreds or thousands of solar masses.
How do you find black holes?
Scientists can’t directly observe black holes with telescopes that detect x-rays, light, or other forms of electromagnetic radiation. We can, however, infer the presence of black holes and study them by
detecting their effect on other matter
nearby.
Which of the following can actually escape a black hole?
Nothing
, not even light, can escape through the event horizon from the black hole. At its center, each black hole is thought to have a singularity, a point of infinite density and zero volume.
Which of the following defines the event horizon or Schwarzschild radius of a black hole?
If a body is smaller than its Schwarzschild radius it has what is called an event horizon at
r=rs
. At the event horizon, gravitational time dilation makes time stop. This also means that the escape velocity is the speed of light. This effectively describes a black hole from which nothing, not even light, can escape.
Why can light escape a black hole?
Answer: Within the event horizon of a black hole space is
curved to the point
where all paths that light might take to exit the event horizon point back inside the event horizon. … Since nothing can travel faster than the speed of light, nothing escapes the event horizon of a black hole.
How big would Earth be in a black hole?
Any object with mass, such as a planet, moon, or a human, has a Schwarzschild radius. If an object’s physical radius becomes smaller than its Schwarzschild radius this object will become a black hole. The Earth’s Schwarzschild radius is thought to be around 8.7mm, or
roughly 17.5mm in diameter
.
What shape is a black hole?
The topology of the event horizon of a black hole at equilibrium is always
spherical
. For non-rotating (static) black holes the geometry of the event horizon is precisely spherical, while for rotating black holes the event horizon is oblate.
