Astrophysics

Question 1

Define gravitational potential

Answer 1

The work done energy to move 1kg mass from infinity to that point in a gravitational field

Question 2

Define apparent brightness

Answer 2

Amount of energy per second reaching a detector per unit area

Question 3

Name the journey of a lifetime of the sun

Answer 3

Stellar nebula->the star-> red giant-> planetary nebula-> white dwarf

Question 4

Name a lifetime journey of a large star

Answer 4

Stellar nebula=> large mass star=> red super giant=> supernova=> either a neutron star or black hole

Question 5

What type of fusion happens in stars

Answer 5

Proton proton chain 

Question 6

Explain the ultraviolet catastrophe

Answer 6

It was that the hotter the object got towards the ultraviolet region the irradiance will increase infinitely. This is a failure of classical physics