Question

Distance travelledby light in one year invacaum difines

Answer 1

Answer:

Explanation:

     Distance travelled by a light in one year defines a light year .

           Speed of light = 3 ×$10^{8}$ m/s

       

     Distance travelled by light in one second = 3 ×$10^{8}$ m

      Distance travelled by light in one year  = 3 ×$10^{8}$ × 365 × 24 × 60 × 60 m

                                                                         =   9.46 x 1012 km