Calculate the Schwarzschild radius of the Sun.
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
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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: Suppose you observe a star orbiting the Galatic center at a speed of 1000 km/s in a circular orbit…
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Q: How massive would a black hole have to be to have an event horizon the same size as the Earth?…
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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: why is G considered to be the same throughout the universe?
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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: 1.0 0.8 0.6 Cosmic background data from COBE 0.4 0.2 0.0l 0.5 10 Wavelength A in mm c) The left hand…
A: from the graph, the maximum intensity of radiation is at λ=1 mm. From Wein's law, we have…
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: In the parallax method of determining stellar distances, the angle to a star is measured while che…
A: Let's assume b=1AU And distance between sun and alpha centaurie is d. θ=2.1x10-4…
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: Calculate the size to which the Sun should shrink to become a blackhole.
A: The limit to which an object can shrink without undergoing gravitational collapse is called…
Q: What is the escape velocity at the surface of a typical neutron star?
A: In celestial mechanics, the escape velocity is defined as the minimum velocity required by a…
Q: What is sn1604 radius in 1952 and 2000
A: Evaluate the sn1604 radius in 1952 and 2000.
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: WR 68a is a relatively newly discovered (2015) double-lined spectroscopic binary. It has an orbital…
A: Solution: Calculate the orbital radius of each planet from the given time period and velocity.…
Q: Calculate the Eddington limit for star of 10³0 Msun.
A: In a star, the radiation pressure is constantly pushing away matter while gravity is pulling it in.…
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: How do black holes form?
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Q: Let's compare the acceleration due to gravity at the surface of a Sun-like star to a white dwarf of…
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- You observe the H-beta line of Hydrogen in a distant galaxy to have a wavelength of 558.9 nm. What is the radial velocity of the galaxy?The two stars Sirius A and Sirius B orbit their commoncenter of mass. Sirius A has a mass of 4.12 × 1030kg andSirius B has a mass of 2.04 × 1030kg. Assuming theyeach have circular orbits and they stay 2.99 × 1012mapart, what is the radius of the orbit of Sirius A?Show work. For the following: A parsec is a distance equal to 3.26 light years. The speed of light is 2.998 x 10°m/s. A nght year is a unit of distance equal to the distance light travels in one year. The brightest star in the night sky is Sirius, (Not the radio station) is 2.63 parsecs away. (1km30.621miles, 365d-1yr) How many miles away is this star?
- What does a black hole sound like?Imagine you are in an indestructible spaceship orbiting a black hole and you decide to launch a probe into the black hole. Explain how time would pass differently for you and the probe as it is pulled into the black hole. Also, explain what the onboard camera would observe as it passed the photon sphere and the event horizon.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)
- A black hole has a schwarzschild radius of 25 km. How much mass is contained in the black hole?A Type Ia supernova is observed and achieves an apparent magnitude of m = 19.89 at peak brightness. The absolute magnitudes of Type Ia supernovae at peak brightness are known to be M=−19. Determine the distance to the supernovae in units of Mpc.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.
- A Doppler redshift in light from a star indicates that the star is_____.If the sun has a Schwarzschild radius, why isn't it a black hole?Problem Set on Binary Systems: 1.Consider two stars in orbit about a mutual center of mass. If a1 is the semimajor axis of the orbit of star of mass m, and a, is the semimajor axis of the orbit of star of mass m2, prove that the semimajor axis of the orbit of the reduced mass is given by a = a, + a2. points)