Extra mass dumped on a white dwarf creates a nova, but if dumped ...

[Haya94]

Extra mass dumped on a white dwarf creates a nova, but if dumped on a neutron star, it creates
 
  A) a millisencond pulsar.
  B) an X-rays burster.
  C) a black hole.
  D) a gamma-ray burster.
  E) a pulsar.

Question 2

Explain the appearance of the Sun's spectrum, as noted by Fraunhofer.
 
  What will be an ideal response?

[popopong]

Answer to Question 1

B

Answer to Question 2

The Sun is dense, and gives rise to a continuous spectrum, peaked in the color yellow as dictated by the 5800K temperature of its surface. Then the cooler, less dense gas above the surface absorbs some of the energy in transit, revealing its composition by the particular absorption lines we observe from Earth.

[Haya94]

Thanks for the timely response, appreciate it

[xiazhe]

Excellent