If the sun has a Schwarzschild radius, why isn't it a black hole?
Q: Calculate the gravitational redshift of radiation of wavelength 550 nm (the middle of the visible…
A: The gravitational redshift is given by the formula, z=11-2GMc2r-1 where, G is the gravitational…
Q: TRUE OR FALSE A Black Hole’s singularity has zero radius yet can accommodate infinite mass.
A: SOlution: Is black hole has zero singularity and yet capable of taking all the mass inside.
Q: hat is the mass of a black hole with a Schwarzschild Radius of 1 AU? Please show w
A:
Q: How can a black hole emit X-rays?
A: Black holes are regions of high gravity in spacetime. Once a black hole is formed it will start…
Q: How massive would a black hole have to be to have an event horizon the same size as the Earth?…
A: .
Q: Calculate the mass of black hole with a radius of 20 km.
A: For a blackhole, the radius of the event horizon or the point of no return is defined as the…
Q: Calculate the deflection of light caused by the gravity of a star of mass 2.1M sun and radius…
A: A large gravitational source is capeable of bending the space around it. This will cause the light…
Q: Approximate the wavelength of the Hawking radiation from a black hole of mass 1.5×1030 kg 74 km 86…
A: To approximate wavelength of Hawking radiation from a black hole , we can use formula for…
Q: An AGN is emitting with a luminosity of 2×1040W. The AGN's brightness varies by 10% on a time scale…
A: GivenAn AGN is emitting with a luminosity of 2×1040W. The AGN's brightness varies by 10% on a time…
Q: Calculate the Schwarzschild radius of an average human weighing 65 kg.
A: When an object crosses its Schwarzschild radius it causes an irreversible gravitational collapse.…
Q: The H-alpha line from a star is observed to be 725 nm. Estimate its redshift.
A: As per De Broglie's hypothesis light can behave both as a wave and particle. Thus light waves can…
Q: What is the acceleration of gravity at the surface if the white dwarf has 1.5 the mass of the sun…
A: Given, Mass of white dwarf, Mw=1.5×Ms=1.5×1.989×1030 kg=2.98×1030 kg, and the radius of the white…
Q: A Black Hole gets its name because it is the remains of a massive black star. True False
A: When the massive stars collapse, then the black hole is produced. It absorbs all the mass and light…
Q: Is the event horizon of a black hole the actual physical surface of the object?
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Q: Will the Higgs-Boson particle create a black hole and destroy the Earth
A: No, it will not create a black hole and certainly not big enough to destroy the earth.
Q: An x-ray photon escapes the accretion disk of a black hole of 5 solar masses and a radius of 14.7…
A: As per general relativity due to space-time curvature, the frequency of the photon will reduce as it…
Q: 1. (a) Calculate Schwarzschild radius of a blackhole with mass same as our Sun. (S points) (b)…
A: The Schwarzschild radius or gravitational radius is the minimum radius below which an object becomes…
Q: Let's say a spaceship is approaching Sagittarius A*. How close to this black hole must the spaceship…
A: The formula for gravitational time dilation is given by t=t01-2GMrc2 here, t=time in the…
Q: Why haven't we detected any Primordial black holes?
A: Primordial black holes or PBH are black holes that formed soon after the birth of the universe. The…
Q: Assume a neutron star has a mass of about 1.2 times the mass of the Sun and a radius of 7…
A: Given: Mass of neutron star = 1.2 times mass of sun. Radius of neutron star = 7 km. Diameter of…
Q: How close, r, to the center of a neutron star would a manned satellite be orbiting if it were at the…
A: Gravitational force of earth’s surface = Gravitational force of star GMN mr2=mg r= G MNg
Q: 38 An AGN hosts a central Black Hole of mass 5×10 kg. The AGN emits at 1/6 of the Eddington limit.…
A: To find the luminosity of the AGN, we first need to calculate the Eddington luminosity (LEdd) and…
Q: Use the Schwarzchild formulaRs =2GM / c2whereRs = Radius of the star, in meters, that would cause it…
A: Given: Mass of the sun = 2 x 1030 kg.
Q: an introduction on what is the event horizon of a black holes?
A: The occasion horizon of a black hollow is a essential idea in astrophysics that marks the boundary…
Q: How do black holes form?
A:
Q: the Sun were to become a black hole at what distance will the escape veloc
A: The distance at which the escape velocity of a black hole becomes the speed of light is called the…
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- You discover by dropping particles into it that the Event Horizon (Schwartzschild Radius) of a black hole is 171 km. How massive is it? (enter just the number in solar masses)What does a black hole sound like?Assume a neutron star has a mass of about 1.2 times the mass of the Sun and a radius of 7 kilometers. If the escape speed is V2esc=2GM/R, work out the formula for the radius of the Event Horizon around a Black Hole of mass M.
- Calculate the Schwarzschild radius of the Sun.As a mass m of gas falls into a black hole, at most 0.1mc2 is likely to emerge as radiation; the rest is swallowed by the black hole. Show the Eddington luminosity for a black hole of mass M is equivalent to 2*10-9 Mc2yr-1. Explain why we expect the black hole's mass to grow by at least a factor of e every 5*107 years. Where Edding Luminicity is defined as LE=(4piGMmpc)/(sigmaT), where G is the gravitational constant, M is the mass of the black hole, mp is the mass of a proton, c is the speed of light, and sigmaT is Thomson scattering where sigmaT=6.653*10-25 cm2.Five astronauts (A - E) are watching a star collapse to form a black hole. Which of the flight plans require that the astronaut travel faster than light? A COLLAPSING STAR THAT FORMS BLACK HOLE r=0 Singularity Time Inside of Star At B D Rs Radius of a Star E
- Which of the following statements best describes the behaviour of an object falling towards the Event Horizon of a Black Hole (according to an observer a long way from it)? As gravity increases the falling object will not suffer any change in appearence or the progression of time. As gravity increases the object's light will be compressed, leading to it looking bluer, with time appearing to passing more slowly for it. The falling object will appear to experience an increase in the rate of time, and it's colour will appear evermore red. As the falling object experiences ever stronger gravity, it will become redder and time will appear to pass more slowly for it.True or false The escape speed from a black hole would be greater than the speed of light. If the impact time of a collision is increased, the force of impact will decrease. A size of a Kelvin degree (oK) is larger than a Celsius degree (oC).The area of the event Horizon of a black hole is 4tRg². Use the Schwarzschild metric to verify this. (Please answer in detail or skip)
- Calculate the gravitational redshift of radiation of wavelength 550 nm (the middle of the visible range) that is emitted from a neutron star having a mass of 5.8 × 10³⁰ kg and a radius of 10 km. Assume that the radiation is being detected far from the neutron star.Calculate the Schwarzschild radius for a uranium-238 nucleus. (r = 7x10-¹5 m).In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun that occupy less space than our moon. Suppose that one of these black holes has a mass of 1x10^3 suns and a radius equal to one-half the radius of our moon. What is the density of the black hole in g/cm^3? The radius of our sun is 7.0x10^5 km, and it has an average density of 1.4x10^3 kg/m^3. The diameter of the moon is 2.16x10^3 miles.