Does observed gravitational lensing correspond to a converging or diverging lens? Explain briefly.

Q: A cosmic particle is traveling with a speed 0.77 times the speed of light. What is the Lorenz factor…

A: Let the speed of cosmic particle be V m/s And the speed of light be C m/s It is given that... V =…

Q: Based on the theory of special relativity, calculate the length at rest  (L0  = ?) if it is given…

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Q: Galaxy A is reported to be receding from us with a speed of 0.35c. Galaxy B, located in precisely…

A: a) The speed of the Galaxy A relative to our galaxy.According to Einstein's relativity, the Galilean…

Q: Light is without mass, so how can gravity have an effect on light?

A: Einstein’s general theory of relativity explains gravity as distortion of four dimensional spacetime…

Q: Do binary stars (double-star systems that orbit about a common center of mass) radiate gravitational…

A: Binary stars are the system of double star which orbit around a common center of mass.

Q: Explain the term Gravitational lensing?

A: Gravitational lensing is the term that is used to describe the bending and distortion in the path of…

Q: How would you explain spacetime to an unschooled person?

A: The solution is highly intricate, yet time and space are intimately connected. Because it takes time…

Q: Given the possible sources of gravitational waves in the universe, would you expect them to have…

A: Gravitational wave radiated by a charged particle will be weaker than the electromagnetic wave…

Q: What is time dilation and why is it significant for understanding Einstein's theory?

A: Time dilation is defined as the time cut short between the two events when observed by two observers…

Q: How does a gravitational red-shift differ from a Doppler red shift?

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Q: why does light moving away from us appear redshifted?

A: When light moves away, it appears redshifted.

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

A: Given:  Black hole

Q: Who won the Nobel Prize for discovering the cosmic background radiation?   a. Penzias and Wilson…

A: About discovering of cosmic background radiation .

Q: What are gravitational waves, and have they yet been observed either directly or indirectly?

A: An object moving in space, a disturbance will be produced with time in the form of ripples like that…

Q: is Lorentz law? Give definition, background, uses and examples of it.

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Q: I'm stumped on this question: A clump of matter does not need to be extraordinarily dense in order…

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Q: What does a black hole sound like?

A: Black hole is a heavenly body.

Q: Explain why the speed of light is the maximum attainable

A: Hi , please find the answer

Q: Suppose a distant quasar has a redshift of 6. At what fraction of the speed of light is the quasar…

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Q: Suppose you decide to travel to a star 85 light-years away at a speed that tells you the distance is…

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Q: If a galaxy moving away from the Earth has a speed of 1000 km/s and emits 656 nm light…

A: The speed of the galaxy is 1000 km/s and the soeed of Earth's orbit is 30 km/s which is…

Q: In the lab, one of the lines of sodium is emitted at a wavelength of 590 nm. In the light from a…

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Q: Explain the direct method used by Albert Michelson to calculate the speed of light.

A: The experimental setup was as follows: Light generated from a source is directed towards a rotating…

Q: Would an astronaut falling into a black hole see the outside universe red-shifted or blue-shifted?

A: As the astronaut falls into a black hole, outside universe will look blue shifted. The time scale…

Q: Suppose black holes radiate their mass away and the lifetime of a black hole created by a supernova…

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Q: When you look at distant galaxy through a telescope, how is it that you are looking backward in…

A: We know that the speed of light is 3×108m/s. The speed of light being finite takes a finite time to…

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

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Q: What are gravitational waves, how are they generated, what do they do and how can we detect them?…

A: Gravitational-wave =?  how are they generated?