Astrophysics

Question 1

what is meant by gravitational field strength

Answer 1

the weight per unit mass

Question 2

what is meant by gravitational potential

Answer 2

the gravitational potential at a point in a field is the work done in bringing a unit mass from infinity to the point

Question 3

what is meant by swarzchild radius

Answer 3

the distance from the centre of a black hole to the edge of a black hole

Question 4

what is the event horizon

Answer 4

the minimum distance from the edge of a black hole where light can escape

Question 5

accelerating frames of reference are

Answer 5

non-inertial

Question 6

non accelerating frames of reference are

Answer 6

inertial

Question 7

what is meant by the equivalence principle

Answer 7

it is impossible to tell the difference between constant acceleration and the effects of a uniform gravitational field

Question 8

what is it meant by a geodesic path

Answer 8

the shortest distance between two points in space time that light travels

Question 9

what is a black body emitter

Answer 9

it emits light at all frequencies in al directions