Question

what is the distance in km of a quasar from which light rakes 3.0 billion years to reach us?​

Answer 1

Answer:

Time taken by quasar light to reach Earth = 3 billion years

=3×10

9

years=3×109×365×24×60×60 s

Speed of light =3×10

8

m/s

Distance between the Earth and quasar =(3×10

8

)×(3×10

9

×365×24×60×60)

=283824×10

20

m=2.8×10

22

km