9. Light from our first door neighbouring star reachesus in 4.5 year. Calculate its distance from earth inkilometre. Velocity of light is 3 x 108 m s-1. Take 1year = 365 days.

9. Light from our first door neighbouring star reachesus in 4.5 year.

1.	9. Light from our first door neighbouring star reachesus in 4.5 year. Calculate its distance from earth inkilometre. Velocity of light is 3 x 108 m s-1. Take 1year = 365 days.
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9. Light from our first door neighbouring star reachesus in 4.5 year. Calculate its distance from earth inkilometre. Velocity of light is 3 x 108 m s-1. Take 1year = 365 days.​

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9. Light from our first door neighbouring star reachesus in 4.5 year. Calculate its distance from earth inkilometre. Velocity of light is 3 x 108 m s-1. Take 1year = 365 days.