what are black holes

Q: What is a black body? On what factors does the radiation emitted from it depend?

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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: What type of explosion occurs when a black hole is born? Group of answer choices Gamma-ray Burst…

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Q: Sun

A: The distance of a nearby star from the earth is calculated by a method called a stellar parallax…

Q: Explain the principle of a synchrotron.

A: Synchrotron is a device that is used to accelerate the circular velocity of the particle.

Q: Is the event horizon of a black hole the actual physical surface of the object?

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Q: Astronomy introduction

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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: A star is observed to undergo circular orbit around the black hole located at the centre of the…

A: We have a star which is undergoing a circular orbit of radius R=1000 AU=1.469*1014m with a time…

Q: In 1999 scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of…

A: The mass of black hole,

Q: In order to form a black hole, a star must be about how much more massive than our Sun to form a…

A: When star runs out of fuel (i.e. Hydrogen) it starts burning helium. When it runs out of helium too,…

Q: How can we “observe” a black hole if neither matter nor radiation can escape from it?

A: Given:  Black hole

Q: How do black holes form?

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Q: (Astronomy) Orbital Period. What is the orbital period of a bit of matter in an accretion disk…

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Q: The radius at which nothing can escape the pull of a black hole is called the ________.

A: The radius at which nothing can escape the pull of a black hole is called the Schwarzschild radius.

Q: Define an idealized blackbody

A: As per bartelby guidelines, only one question can be solved, kindly post the others separately.

Q: Einstein said that gravity exists because: *   A. massive objects warp space. B. of the existence of…

A: Einstein said gravity exist because Let's check each option one by one. A. Massive object warp space…

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 would be the diameter (of the event horizon) of a black hole with the same mass as Jupiter?

A: Blackhole is a hypothetical concept that contains everything in the universe within a very small…

Q: What does a black hole sound like?

A: Black hole is a heavenly body.

Q: Choose correct statement from below options. a. Temperature' and 'speed' are fundamental quantities.…

A: Given:- Defferent statements regarding fundamental and derived quantities.

Q: Binary Subtraction of X-Y

A: Solution is in next step .  for binary 1-1=0           0-0=0          1-0=1          0-1=1…

Q: What is a blackbody? How do real bodies differ from blackbodies?

A: Black body is an ideal concept which emits the maximum amount of radiation at a given temperature…

Q: Black holes with masses smaller than those formed in supernovas may have been created in the Big…

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Q: Doppler redshift in light from a star indicates that the star is_____.

A: When there is relative motion between observer and source then there is change in frequency ( or…

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: What is the speed of dark?

A: The light has a speed of 3×108 m/s and it takes about 8 minutes to reach the earth. The small…

Q: What is a 'black-body'?

A: A blackbody is a body which can absorb all the radiation falling on it.

Q: calculate the Schwarzschild radius of a black hole with a mass 20 times the mass of the Sun.

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Q: What indicates that the gravitational wave originated from the merger of a black hole?

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Q: What is the Schwarzschild radius (in km) of a 20 solar mass black hole?

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Q: Which of the following is a Non-Luminous body? A) Glowing bulb B) Moon C) Burning candle D) Firefly

A: There are two types of the bodies in concern of the light.  Luminous bodies and non luminous bodies.…

Q: Can you go fast enough to get enough mass to become a black hole?

A: According to the question travelling at a high speed does not affect your mass, even in Einstein's…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.