What is the distance in km of a quasar from which light takes 3.0 billion years to reach us.

What is the distance in km of a quaser from which ligth takes 3.0 billion years to reach us ?

The farthest objects in our universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the earth. What is the distance in km of a quasar from which light takes 3 billion years to reach us?

The farthest objects in out universe discovered by modern astronomeres are so distant that light emitted by them takes billions of year to reach the earth. These object (known as quasers) have may puzzling features, which have yet not been satisfactorily explained. What is the distance in km of a quasar form which light takes 3.0 billion years to reach us?

What is the distance in km of quasar from whigh light takes 3 billion years to reach us? c=3xx10^(5) km/s.

What is distance of quasar from which light takes 5 billion years to reach us ?

A new unit of length is so chosen that the speed of light in vacuum is unity. What is the distance (in this new unit) between the sun and the earth if light takes 8 min and 20 second to reach the earth from the sun?

What is the distance that light travels in one year called?

How much time it takes light to reach from sun to earth?

A ray of light is inciden rormally on a glass slab of refractive index mu of thckness 'd' which is at a distance x from the glass. The ray of light takes same time to reach from source to slab and to reach from sorce to slab and to pass through the slab. The thickness of the slab is