Question

it takes time 8 minutes for light to reach from the sun to earth surface. if speed of light is taken to be 3×10^8 m s^-1 find the distance for the sun to the earth in km​

Answer 1

$distance = speed \times time$

Speed = 3 × 10 ^ 8 m/s

Time = 8 mins = 8 × 60 = 480 s

Distance = 3 × 10 ^8 ×480

= 1440 × 10^8 m

= 1440 × 10^5 km