Q: How does the lighthouse model explain pulsars? in two sentences.
A: Pulsars are spinning neutron stars that emit beams of radiation from their magnetic poles
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: The expanding bubble of hot gas shown in the figure, which has been inflated by the light from a…
A:
Q: person weigh on the surface of this star?
A: Mass of sun, m Mass of star, M=1.8×m Radius of Sun, r Radius of star, R=0.06×r Given, weight of a…
Q: What is the densest substance in the universe?
A: Osmium is the densest thing in the universe.
Q: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter ?
Q: Is the event horizon of a black hole the actual physical surface of the object?
A:
Q: Galaxy B moves away from galaxy A at 0.519 times the speed of light. Galaxy C moves away from galaxy…
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: Is there a way to quantify Dark Matter?
A: Required : Is there a way to quantify Dark Matter.
Q: Why haven't we detected any Primordial black holes?
A: Primordial black holes or PBH are black holes that formed soon after the birth of the universe. The…
Q: How does a gravitational red-shift differ from a Doppler red shift?
A:
Q: Calculate the surface temperature of the star Betelgeuse whose λmax is 850 nm
A: Wien's Law of Blackbody Radiation λmaxT = a constant = 3 × 106 where λmax = wavelength of radiation…
Q: What would the wavelength of the 21 cm line be for a source moving away from the Earth at 10% the…
A: As per the Doppler effect, the observed wavelength can be found as, Here, λO, λS, v, and c…
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: Consider hot Jupiter with a temperature of 3138 K orbiting the star Vega at what wavelength in nm…
A: given- Temperature of jupiter =3138 K
Q: What exactly is dark matter?
A: Particles that do not absorb, reflect, or emit light, hence cannot be detected by electromagnetic…
Q: The longest wavelength of light humans can see is around 750 nm, deep red. If we were to observe a…
A: For light coming near a black hole, the light gets red shifted due to gravity. The observed…
Q: What characteristics must a binary star have to be a good candidate for a black hole? Why is each of…
A: The characteristic must a binary star posses for it to be a good candidate for black hole is, From…
Q: Galaxy B moves away from galaxy A at 0.541 times the speed of light. Galaxy C moves away from galaxy…
A: We have to use special theory of relativity to solve this problem
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given information:Temperature of the object (T) = 45000 K
Q: an introduction on what are black holes and how they are formed?
A: As per the we have to give introduction on what are Black holes and their formation.
Q: Suppose the temperature of a blackbody increases by 20%. What will happen to the total rate at which…
A: Energy radiated by a blackbody depends on its temperature and the relationship between temperature…
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