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Consider the following statements regarding the gravitational waves:
Every massive object that accelerates produces gravitational waves.
Stephen Hawking was the first to have predicted the existence of gravitational waves.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements regarding the gravitational waves: ...
Explanation:
Every massive object that accelerates produces gravitational waves:
- This statement is correct. Gravitational waves are ripples in spacetime that are produced when massive objects accelerate. When these objects move or change speed, they create these waves that propagate through space.
Stephen Hawking was the first to have predicted the existence of gravitational waves:
- This statement is incorrect. Albert Einstein was actually the first to predict the existence of gravitational waves as a consequence of his general theory of relativity in 1916. Stephen Hawking made significant contributions to the field of theoretical physics but he was not the first to predict gravitational waves.
Therefore, the correct answer is option 'A' - 1 only.
Every massive object that accelerates produces gravitational waves:
- This statement is correct. Gravitational waves are ripples in spacetime that are produced when massive objects accelerate. When these objects move or change speed, they create these waves that propagate through space.
Stephen Hawking was the first to have predicted the existence of gravitational waves:
- This statement is incorrect. Albert Einstein was actually the first to predict the existence of gravitational waves as a consequence of his general theory of relativity in 1916. Stephen Hawking made significant contributions to the field of theoretical physics but he was not the first to predict gravitational waves.
Therefore, the correct answer is option 'A' - 1 only.
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Community Answer
Consider the following statements regarding the gravitational waves: ...
- Gravitational waves are 'ripples' in space-time caused by some of the most violent and energetic processes in the Universe. Albert Einstein predicted the existence of gravitational waves in 1916 in his general theory of relativity. Einstein's mathematics showed that massive accelerating objects (such as neutron stars or black holes orbiting each other) would disrupt space-time in such a way that 'waves' of undulating space-time would propagate in all directions away from the source. These cosmic ripples would travel at the speed of light, carrying with them information about their origins, as well as clues to the nature of gravity itself.
- Stephen Hawking's theorem about the area of a black hole's event horizon that has been confirmed thanks to data from the first burst of gravitational waves detected by LIGO, is only 40 years old. Hence statement 2 is not correct.
- Sources and Types of Gravitational Waves:
- Every massive object that accelerates produces gravitational waves. This includes humans, cars, airplanes etc., but the masses and accelerations of objects on Earth are far too small to make gravitational waves big enough to detect with our instruments. To find big enough gravitational waves, we have to look far outside of our own solar system. Hence statement 1 is correct.
- It turns out that the Universe is filled with incredibly massive objects that undergo rapid accelerations that by their nature, generate gravitational waves that we can actually detect. Examples of such things are orbiting pairs of black holes and neutron stars, or massive stars blowing up at the ends of their lives.
- Continuous gravitational waves are thought to be produced by a single spinning massive object like a neutron star. Any bumps on or imperfections in the spherical shape of this star will generate gravitational waves as it spins.
- The next class of gravitational waves LIGO is hunting for is Compact Binary Inspiral gravitational waves. So far, all of the objects LIGO has detected fall into this category. Compact binary inspiral gravitational waves are produced by orbiting pairs of massive and dense ("compact") objects like white dwarf stars, black holes, and neutron stars. There are three subclasses of "compact binary" systems in this category of gravitational-wave generators:
- Binary Neutron Star (BNS)
- Binary Black Hole (BBH)
- Neutron Star-Black Hole Binary (NSBH)
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Consider the following statements regarding the gravitational waves: Every massive object that accelerates produces gravitational waves. Stephen Hawking was the first to have predicted the existence of gravitational waves. Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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