How can a black hole emit X-rays?
Q: What is a black body? On what factors does the radiation emitted from it depend?
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Q: A black hole is a blackbody if ever there was one, so it should emit blackbody radiation, called…
A: The total energy is given by: E=MC2 The surface area is given by: A=16πG2M2c4 The temperature is…
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: Is the event horizon of a black hole the actual physical surface of the object?
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Q: The diagram shows the believed structure of a black hole if viewed from the top and in 3D. Calculate…
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Q: Why is a black hole invisible?
A: A black hole is a region in space where the pulling force of gravity is so strong that light is not…
Q: Why black holes are difficult to observe directly?
A: In supernova the collapse of massive stars core form a black hole. In space , a Black hole is a…
Q: If the inner accretion disk around a black hole has a temperature of 1,000,000 K, at what wavelength…
A: Black holes are regions of large gravitational force in spacetime. The gravitational force is so…
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: What causes X-ray emissions in a binary system of a star and a black hole?
A: A binary system is two gravitational bodies orbiting each other with a common center of mass. A…
Q: A light of wavelength 620 nm is emitted from the following four places. What wavelength is observed…
A: As per general relativity, electromagnetic waves or photons that are traveling away from a…
Q: What are the only things we can tell about the nature of the material within a black hole?
A: Balck hole can be defined as a region in spacetime with the strongest gravitational force. The…
Q: What is the peak wavelength (in nm) of a neutron star's luminosity if its temperature is 106 K?
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Q: Are there different types of black holes?
A: Since you have posted multiple questions, we will provide the solution only to the first question as…
Q: Calculate the mass of a black hole at room temperature.
A: Black holes are regions of space-time where the gravity is very large that nothing, not even light…
Q: How can a black hole be massive but not big?
A: A blackhole is a region in space which have an extremely high gravitational field so that even light…
Q: Distances to the nearest stars (up to 500 ly away) can be measured by a technique called parallax,…
A: The distance between the Sun and the Star is given as, dS = 4 light year (or) dS = 3.784×1013 km TO…
Q: What would you have to do to make earth a black hole ?
A: Black holes are objects in space from which even light can not escape. What makes the black hole so…
Q: What does a black hole sound like?
A: Black hole is a heavenly body.
Q: How likely is it for a black hole to collide with Earth? Would we have much warning?
A: In space-time curvature, black holes are the region where the gravity is so strong that nothing even…
Q: Calculate the Schwarzschild radius of the Sun.
A: The Schwarzschild radius for an object is defined as the radius below which the object will undergo…
Q: A black hole has a Schwarzschild radius of 25 km. How much mass is contained in the black hole?
A: Schwarzschild radius is defined as the radius below which an object will collapse under its own…
Q: Name the chemicals leading to the formation of black hole.
A: Black holes are formed when highly massive stars are collapsed at the end of their life cycle. After…
Q: If the sun has a Schwarzschild radius, why isn't it a black hole?
A: Every object with a mass has a minimum size to which it can shrink before it undergoes irreversible…
Q: How would it appear to an outside observer if someone were to enter a black hole?
A: General Relativity gives us a way to describe the universe that is independent of any frame of…
Q: ce bursts of X rays
A: X ray bursts occur in low mass X ray binary system where a neutron star and low mass main sequence…
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