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. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us?

Asked by Abhisek | 1 year ago |  153

1 Answer

Solution :-

Time taken by light from the quasar to reach the observer, t = 3.0 billion years 

= 3.0 x 109 years = 3.0 x 10x 365 x 24 x 60 x 60 s

= 94608000 x 109  s

=  9.46 x 1016 m

Speed of light = 3 x 108 m/s
Distance of quasar from Earth  = 3.0 x 108 x 9.46 x 1016 m
= 28.38 x 1024 m

Answered by Pragya Singh | 1 year ago

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